Tuesday, April 14, 2026

Hormuz And Bab Al-Mandeb: The Geopolitics Of The Twin Maritime Chokepoints – Analy


File photo of Houthi rebels patrolling near a merchant ship in Red Sea. Photo Credit: Fars News Agency


April 14, 2026 
By Amb. Prof. Mohamed A. Qubaty

How two narrow waterways linking the Gulf and the Red Sea have become pivotal nodes of geoeconomic leverage in the global economy.

In the twenty-first century, global power is increasingly shaped not only by military capabilities but also by the ability to influence the flows of energy, trade, a

Hormuz And Bab Al-Mandeb: The Geopolitics Of The Twin Maritime Chokepoints – Analysisnd supply chains that sustain the world economy. Nowhere is this transformation more visible than in the strategic maritime corridors linking the Gulf and the Red Sea.

Much of that power is concentrated in a handful of narrow maritime passages where geography compresses global commerce into strategic bottlenecks. Among the most consequential of these are the Strait of Hormuz and the Bab al-Mandeb Strait. Together they form a geostrategic system whose importance extends far beyond the Middle East.

“In an interconnected global economy, the power to disrupt a maritime chokepoint may rival the power to control a battlefield.”

In an era of intensifying geoeconomic competition, maritime chokepoints are increasingly becoming instruments of geoeconomic leverage, allowing regional actors to influence global trade routes and energy flows with effects that can reverberate across continents.

The Changing Language Of Power

For much of the twentieth century, regional conflicts in the Middle East were framed primarily in military terms. Strategic competition was expressed through conventional warfare, territorial disputes, and military alliances.

Today, however, the language of strategic pressure has evolved. In an interconnected global economy, disruption of trade routes and energy flows can generate economic shockwaves far beyond the immediate theater of conflict.

Insurance premiums rise, shipping routes shift, freight costs increase, and energy markets react instantly to signals of instability. The economic consequences often extend across continents. In this context, the strategic value of maritime geography has risen dramatically.




The Bab Al-Mandab Strait and Strait of Hormuz



Hormuz: The World’s Energy Pressure Valve

For decades the Strait of Hormuz has occupied a central place in the architecture of global energy security. A significant share of the world’s traded oil and liquefied natural gas passes through this narrow corridor linking the Persian Gulf to international markets.


Even the mere possibility of disruptions in Hormuz has historically been sufficient to trigger volatility in oil prices. In this sense, Hormuz functions not only as a transit route but also as a geoeconomic pressure valve within the global energy system.
Bab Al-Mandeb: The Southern Gate Of The Rede Sea Economy

At the southern entrance to the Red Sea lies another critical chokepoint: Bab al-Mandeb. This narrow passage links the Red Sea to the Gulf of Aden and the wider Indian Ocean, forming an essential segment of the maritime route connecting Asian manufacturing hubs with European markets via the Suez Canal.

The economic implications of disruptions in Bab al-Mandeb are therefore profound. Disturbances in this corridor can affect global container shipping networks, European energy supplies, trade flows between Asia and Europe, and insurance and freight markets.
The East-West Pipeline Paradox

Saudi Arabia’s energy infrastructure illustrates the strategic interdependence of these maritime chokepoints. In order to reduce dependence on the Strait of Hormuz, Riyadh constructed the East–West pipeline (Petroline), transporting crude oil from the Kingdom’s eastern oil fields to the Red Sea port of Yanbu.

This system was designed to ensure that Saudi exports could bypass Hormuz during periods of regional tension. Yet when oil shipped from Yanbu is destined for Asian markets, tankers must still transit through Bab al-Mandeb before reaching the Indian Ocean.

This structural reality links Hormuz and Bab al-Mandeb into a single strategic system within the maritime geography of the Arabian Peninsula.

The Twin Maritime Bottleneck Equation

Viewed through a broader geostrategic lens, the two straits function as interconnected nodes within the global energy and trade architecture.

Pressure exerted in Hormuz primarily affects Gulf oil exports. Pressure exerted in Bab al-Mandeb influences shipping routes through the Red Sea and the Suez Canal, affecting both energy shipments and global container traffic.

When tensions simultaneously affect both chokepoints, the cumulative economic impact can extend far beyond the region. Shipping costs rise, supply chains face disruption, and global markets react with volatility.

The strategic significance therefore lies less in absolute control of these waterways than in the ability to threaten disruption sufficiently to generate economic consequences.
Conclusion

In the emerging geoeconomic landscape, the significance of maritime chokepoints will only grow. Hormuz and Bab al-Mandeb are no longer merely regional waterways; they are pivotal nodes in a global system where energy security, trade flows, and geopolitical competition intersect.

Understanding the strategic interplay between these two straits — the twin maritime bottleneck equation — offers insight into how geography continues to shape power in the twenty-first century.

Amb. Prof. Mohamed A. Qubaty

Amb. Prof. Mohamed A. Qubaty is a Yemeni diplomat, academic, and former Minister of Information. He writes on Middle Eastern geopolitics, governance, and Red Sea security.


‘Clock Is Ticking’: Hormuz Disruption Raises Fears Of Global Food Crisis


April 14, 2026 
UN News
By Vibhu Mishra


The clock is ticking for global food systems as disruptions in the Strait of Hormuz threaten to choke off the flow of fuel and crucial fertilizers needed for the next planting season – also raising the risk of higher food prices and a new wave of inflation.

A fragile ceasefire between the United States and Iran has done little to restore confidence in the vital maritime corridor, where renewed tensions – including a newly announced US blockade on ships using Iranian ports – are keeping vessels idle and supply chains strained.

The Strait of Hormuz, a narrow but critical waterway, carries a significant share of the world’s energy and agricultural inputs. Disruptions since the outbreak of hostilities on 28 February are already constraining flows of oil, gas and fertilizer for newly planted staples, with ripple effects reaching far beyond the Middle East.

“We have 30-35 per cent of the crude oil, which is not moving, 20 per cent of natural gas…and between 20 to 30 per cent of other fertilizers that are not moving out,” said Máximo Torero, Chief Economist of the Food and Agriculture Organization (FAO).

“That’s the magnitude of the potential impact,” he warned.

Supply bottleneck despite ceasefire

While the ceasefire briefly raised expectations that shipping could resume, uncertainty remains high. Talks between the US and Iran, mediated by Pakistan this weekend, failed to yield any breakthrough.

Many vessels remain stranded in the Gulf, with new shipments yet to enter the corridor. Shipowners and insurers are reluctant to risk costly assets and crews amid ongoing insecurity. Even if tensions ease, it could take days or weeks for traffic to normalise.

That delay is critical, warns David Laborde, Director of Agrifood Economics Division at FAO.

Much of the cargo that left the Gulf before the crisis has already reached its destination — meaning the world is now entering a phase where supplies could begin to tighten.

“We are going to see the real stop in supply” in the days ahead, he said.


A delayed crisis – for now


Despite sharp increases in input costs, global food prices have not yet surged – a point FAO economists stress should not be mistaken for a sign of underlying stability.

The FAO’s Food Price Index for March showed only modest increases, reflecting strong global stocks and good harvests last year.

“We have enough supplies…and good stocks which allow the agri-food system…to be resilient to this shock,” Mr. Torero said.

But that buffer may be short-lived. As planting decisions are made in the coming weeks, farmers facing higher costs and limited access to fertilizers may reduce input use or shift crops – lowering yields in the next season.

“If we don’t have the inputs in the time that is needed…that implies that producers will have to produce with less inputs,” he said. “And therefore, they could have lower yields.”

That, in turn, could drive up food prices later in the year and into the next.

A chain of interdependence

The risks extend across the entire food value chain. Energy underpins everything from farm machinery to transport, while fertilizers – particularly nitrogen-based products linked to natural gas – are critical for crop yields.

The impact is global: from the US and Canada to Australia, farmers depend on stable access to energy and inputs to maintain production, while import-dependent countries – including many in Africa, such as Kenya – face heightened exposure to price shocks and supply disruptions.

Higher oil prices are also increasing incentives to divert crops such as maize, sugar and oilseeds toward biofuel production, tightening the balance between food and fuel.

“If we have rising demand because biofuels start to consume more…and lower supply because we have less input…food prices will go up,” Mr. Laborde warned.

Risks of a ‘perfect storm’

FAO economists warn the situation could deteriorate further if additional pressures emerge – including export restrictions or climate shocks such as the El Niño weather pattern.

In past crises, countries have restricted exports to protect domestic markets, exacerbating global shortages.

“We need to avoid export restrictions…especially now for fertilizers and energy,” Mr. Torero said, warning that without coordination, vulnerable countries could be priced out of essential supplies.

A global risk with local consequences

Although the crisis is centred in the Middle East, its effects are spreading rapidly. Countries in Asia and the Global South are particularly exposed due to their reliance on imported energy and fertilizers and their position in the crop calendar.

“This will start to move from east to west…but also from the south to the north,” Mr. Torero said.

The consequences are both economic and human. Higher food prices hit poorer households hardest, while rising inflation could force governments to tighten monetary policy, slowing growth and increasing debt burdens.

Farmers are also under mounting pressure. Rising input costs and uncertainty are squeezing margins and raising the risk of longer-term disruptions to production.

“When you push them too much, you may bring them into bankruptcy,” Mr. Laborde said. “And then it means there will be a supply problem…for a longer period.”

Alarm bells ringing

Across parts of Asia, early signs of disruption are already emerging.

In South Asia, rising fuel and fertilizer costs are beginning to filter into food prices and farm decisions, with import-dependent economies under mounting pressure.

In Nepal, where millions of households rely on remittances from Gulf countries, disruptions to mobility and rising transport costs are already being felt – raising concerns that what begins as an external shock could quickly translate into hardship at home.
A narrow window to act

FAO is urging governments and international financial institutions to act quickly.

Short-term priorities include avoiding trade restrictions, supporting vulnerable households through social protection, and ensuring liquidity for farmers, including through credit lines and import financing.

Longer term, the crisis underscores the need to diversify energy sources, strengthen infrastructure and reduce reliance on chokepoints like the Strait of Hormuz.

For now, FAO stresses that a full-blown food crisis is not inevitable – but the window to prevent one is rapidly closing.

“The clock is the key…Let’s avoid a perfect storm – be aware of the risks, put the right policies in place and pursue the diplomatic solutions needed to avert a food crisis we do not need,” Mr. Torero urged.

 

Iraq says Tigris river pollution contained after sediment surge from Diyala

Iraq says Tigris river pollution contained after sediment surge from Diyala
Iraq says Tigris river pollution contained after sediment surge from Diyala. / bne IntelliNewsFacebook
By bne IntelliNews April 14, 2026

Iraq's Environment Minister Hallo Askari has announced that authorities have contained a pollution crisis in the Tigris river caused by sediment dislodged by water releases from rivers and dams, Al Sumaria News reported on April 14, citing the Iraqi state news agency WAA.

Askari said the contamination began at the confluence of the Tigris and Diyala rivers and spread downstream to Iraq's southern provinces. Sediment deposits in the riverbed were swept up by water flows, polluting the supply.

"The ministries of environment and water resources, together with municipal authorities in the affected provinces, have managed to contain the phenomenon," al-Askari said. "We are working to prevent the pollution of river water from recurring in the future."

He added that the government was using equipment available through municipal and ministry resources to improve river conditions and enforce existing environmental regulations.

The announcement comes days after a mass fish die-off in Wasit province, where an estimated 1,000 to 1,200 tonnes of fish were lost after a surge of heavily polluted water moved downstream from the Diyala river.

According to the Iraqi Association of Fish Producers, the polluted water had accumulated over an extended period and carried concentrated waste and sediment into the Tigris, raising pollution to what it described as record levels.

Iraq's Ministry of Water Resources said on April 3 that inflows to the Tigris, Euphrates and Diyala had increased following recent rainfall and floods, raising storage levels in dams and reservoirs. The higher water volumes appear to have dislodged accumulated pollutants in the river system.

In February, the independent Green Iraq Observatory issued an urgent warning that the Tigris contained hazardous organic pollutants including polychlorinated biphenyls and volatile organic compounds, posing a direct threat to the health of millions of residents in Baghdad and several southern provinces.

Iraq's water reserves hit 80-year lows in August 2025, and the country's Ministry of Water Resources has warned the river could effectively run dry by 2040 under the combined pressure of upstream dams, climate change and pollution.

Iraq ranks as the fifth most affected country globally by climate change, with rising temperatures, falling rainfall and water shortages compounding economic, social and security risks, a senior environment official said in January.

Deputy Environment Minister Jassim Al-Falahi said at an energy conference in Baghdad that Iraq has recorded unprecedented temperature increases over the past two decades, outpacing global climate scenarios that assume a one-degree rise every 100 years.

"Iraq has effectively outpaced the world in the rate of temperature increase," Al-Falahi said, adding that even a single degree rise sharply increases demand for energy and water, with far-reaching health, social, economic and environmental consequences.

Al-Falahi said climate change has been directly linked to worsening drought, noting that rainfall has fallen by 35% over the past 30 years, based on data from international research centres. Iraq is now experiencing its fourth consecutive year of drought.

Water stress along the Euphrates River, a key lifeline for Iraq, has become a major point of tension with Turkey, which controls upstream flows. Iraqi officials say reduced releases from Turkish dams have sharply curtailed water reaching the country, worsening drought conditions and driving river levels to historic lows.

Environmental observers note that Iraq is now receiving only a fraction of its traditional share from the Tigris-Euphrates system, heightening pressure on shared water resources and prolonging negotiations over water management and cooperation.

Outgoing Prime Minister Mohammed Shia al-Sudani oversaw the signing of the executive mechanism for the framework water cooperation with Turkey in November, but officials say the country faces its worst water crisis this year amid climate change and upstream water use.

 

Tehran enters sixth consecutive year of drought as dam levels drop

Tehran enters sixth consecutive year of drought as dam levels drop
Tehran surrounded by snowy mountains until June still runs out of water. / bne IntelliNewsFacebook
By bnm Tehran bureau April 14, 2026

Tehran has entered its sixth consecutive year of drought, with rainfall in the province down 35% compared to long-term averages despite a slight national improvement, Eghtesad Online reported on April 14, citing Mehr News Agency.

Alireza Jazghasemi, managing director of Tehran Province Water and Wastewater Company, said the capital's dams remained in a fragile state. Tehran sits at the top of the list of Iran's driest provinces, he said, with the Salt Lake catchment basin provinces of Tehran, Alborz, Markazi, Qazvin and Semnan all recording poor rainfall.

While Tehran's rainfall improved 10% compared to the previous water year, Jazghasemi said the precipitation had not translated into adequate runoff to replenish the capital's reservoirs. He expressed hope that snowmelt and spring rains in late April and May could help stabilise dam levels.

Jazghasemi said the company's main strategy for the current year was demand management and expanding the use of water-saving devices, alongside network repairs and meter replacements. He said public cooperation in reducing consumption was essential.

The water utility chief praised staff for maintaining uninterrupted service throughout what he called the "40-day war," with Israel and the US saying the company was among the first to respond to infrastructure damage from airstrikes.

He said some structural projects had been delayed by wartime conditions and would require redesign.

2025 saw significant drought across the West Asia region, with months of perilous conditions and dust storms across several countries and territories, as the effects of climate change continue. 

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Eighteen Iranian provinces face water stress 

To compound the stress on the national water system, 18 Iranian provinces are experiencing below-normal rainfall, with national precipitation at just 84.7% of the long-term average since the start of the current water year, ISNA reported on April 14, citing Meteorological Centre data.

Rainfall distribution across the country has been uneven. The northern Caspian coast, parts of the northwest and the Zagros mountain range have received adequate precipitation, while large areas of central, eastern and southeastern Iran remain significantly below normal levels.

In the past week alone, average national rainfall was recorded at 3.6 millimetres against a normal of 6.0 millimetres, a decline of 39.1%. While total rainfall since the start of the current season reached 42.8 millimetres compared to a long-term average of 25.8 millimetres, the apparent surplus was driven by concentrated bursts in specific areas and has not offset the cumulative national deficit.

Total precipitation since the start of the water year stood at 197.3 millimetres, 5.2% above the long-term figure of 187.3 millimetres. The report cautioned, however, that the recent drop in rainfall and its uneven distribution raised doubts about whether that marginal surplus would hold.

Iran's water crisis has been compounded by the conflict. Infrastructure damage from airstrikes, internet shutdowns affecting monitoring and coordination systems, and the diversion of government resources to wartime priorities have all added pressure to the country's already strained water management capacity. 

 

Colombia to cull dozens of Escobar's hippos in bid to halt population explosion

Colombia to cull dozens of Escobar's hippos in bid to halt population explosion
The origins of the problem trace back to drug lord Pablo Escobar himself, who in the 1980s smuggled four hippos into his private zoo at his Hacienda Nápoles estate in the Magdalena Medio. / unsplashFacebook
By bnl editorial staff April 14, 2026

Colombia will begin euthanising dozens of invasive hippopotamuses in the second half of 2026 as authorities move to contain a rapidly expanding population descended from animals illegally imported by drug trafficker Pablo Escobar four decades ago, Environment Minister Irene Vélez has announced.

The country is home to around 200 hippos, concentrated in the river valleys surrounding the Magdalena, Colombia's main inland waterway. Authorities warn the population could reach 1,000 by 2035 without intervention, a trajectory that scientists say would accelerate damage to native biodiversity and compound water contamination across river systems vital to agriculture and rural livelihoods.

"We must act to reduce the hippopotamus population. These actions are essential to protect our ecosystems and our native species," Vélez said, adding that approximately 80 animals could be euthanised in the initial phase of the programme.

The cull, budgeted at COP7.2bn (around $2mn), marks the most decisive state action yet on a problem that has confounded successive Colombian governments for more than a decade. It includes complementary measures such as confinement and relocation, and comes after a September 2024 ruling by the Administrative Court of Cundinamarca ordered the environment ministry to draw up regulations aimed at eradicating the species within three months — a deadline authorities failed to meet.

The origins of the problem trace back to Escobar himself, who in the 1980s smuggled four hippos into his private zoo at his Hacienda Nápoles estate in the Magdalena Medio. After the drug lord was killed by security forces in 1993 and his ranch was ransacked, the animals escaped into the surrounding forest and began reproducing unchecked. With no natural predators in the Colombian savannah, the population expanded exponentially.

Efforts to bring the animals under control have repeatedly faltered. A government attempt to cull a single hippo in 2009 triggered a public backlash, and hunting was formally banned in 2012.

Hipppos were officially declared an invasive alien species in 2022 due to their negative impacts on ecosystems. Sterilisation and translocation programmes have moved slowly: discussions with eight potential recipient countries — including India, Mexico and South Africa — have yet to yield binding agreements, partly because genetic inbreeding within the Colombian population has reduced interest from foreign zoos and wildlife institutions.

The expansion poses escalating risks to species including river turtles and manatees, while the animals' volume of excrement is altering the chemical composition of local watercourses. "They can really pollute water resources. They're an invasive species. They don't really belong there," Joshua Hammer, a journalist who investigated the case for Smithsonian Magazine, noted in 2024. "It's rapidly changing the biome and possibly threatening these other animals."

Although hippos kill hundreds of people annually in Africa, Colombia has so far recorded no fatalities, though confrontations with fishermen have been reported along the Magdalena.

The announcement has reignited a long-running dispute between conservation scientists and animal rights advocates. The former broadly support culling as a necessary, if unpalatable, population management tool; the latter argue the crisis reflects decades of policy failure and raises unresolved questions about the ethics of lethal control.

Colombia remains the only country outside Africa with a free-roaming wild hippo population, an unlikely legacy of Escobar's private menagerie that has evolved from a local curiosity into a national ecological and fiscal liability.

South Korean industry faces crisis over critical material shortages

South Korean industry faces crisis over critical material shortages
/ Shawn - UnsplashFacebook
By IntelliNews April 14, 2026

South Korea’s semiconductor and pharmaceutical sectors face critical supply disruptions as uncertainty surrounding the Strait of Hormuz chokepoint deepens, the Korea JoongAng Daily reports. The economic consequences of a blockade could prove more debilitating than surging energy prices, as the country relies heavily on Middle Eastern raw materials that are difficult to substitute. 

Middle East geopolitical risks are expanding from energy to industrial materials, posing a greater threat than oil spikes, according to the Korea International Trade Association (KITA). Beyond crude and naphtha, instability in the supply of helium, bromine, and ammonia directly threatens Korea’s core industries. This shift is significant because while oil price hikes affect margins, a total lack of specialised raw materials can force an immediate halt to high-tech manufacturing lines, Korea JoongAng Daily reports.

Samsung Electronics (005930.KS) and SK hynix (000660.KS) are particularly vulnerable, accounting for nearly 41% of the Kospi’s market capitalisation as of April 13. Any production shortfall at these firms would escalate into a crisis for global clients, including US Big Tech. South Korea relies on Qatar for 64.7% of its helium and on Israel for 97.5% of its bromine, according to The Elec. Global helium spot prices have already surged 50% since the conflict began, according to KITA data. According to a report by Anadolu Agency, this volatility is compounded by the fact that helium is recovered as a by-product of liquefied natural gas (LNG) processing, and Qatar accounts for approximately 30% to 38% of global helium supply.

The silent threat

The semiconductor bottleneck represents the most severe risk to the global tech ecosystem. Unlike oil, which can be sourced from strategic reserves, high-tech gases like helium and bromine have a highly concentrated production base. Helium is used as a critical coolant in wafer fabrication and is essential for cooling ASML’s extreme ultraviolet (EUV) lithography machines. The crisis intensified following drone and missile strikes on Qatar’s Ras Laffan Industrial City in early March, which damaged the world's largest helium production complex, Fusion Worldwide reports. While industry sources initially estimated six months of inventory, analysts warn that helium cannot be stored in massive quantities at fabrication sites. Working inventory at most facilities typically lasts only one week, making plants dependent on continuous inbound shipments that are now blocked by the closure of the Strait of Hormuz.

Bromine, while not directly incorporated into chipmaking, is essential for hydrogen bromide (HBr) used in etching processes. While South Korea imports finished HBr from Japan and the US, the upstream reality is fragile because Israel and Jordan control over 70% of global liquid bromine production, according to The Elec. Japan, Korea’s primary HBr supplier, relies on Israel for 72.5% of its raw liquid bromine, creating a domino effect that ties Asian manufacturing directly to the Middle East conflict. While chipmakers possess the technology to recycle helium, such drastic measures remain an optional buffer for now, though the widening conflict has triggered a total rethink of long-term inventory management.

Government response and the June deadline

South Korean Industry Minister Kim Jung-kwan dismissed fears of an imminent production halt during an appearance on the KBS program Sunday Diagnosis on April 12. He revealed that the government has secured US substitutes for helium through the end of June to prevent plant shutdowns, Chosun Biz, reports. The Ministry of Trade, Industry and Energy has formed a dedicated task force of 40 officials to monitor supply conditions and allocated KRW869.1bn ($584.6mn) in a supplementary budget to stabilise supply chains. This funding is intended to subsidise the higher costs of sourcing materials from non-Middle Eastern suppliers, cover the import price gap for naphtha, and bolster domestic storage capacity for critical industrial gases. Kim also noted that the Cheonghae Unit destroyer Dae Joyeong is preparing to escort Korean vessels to ensure safe passage through the Red Sea and toward Saudi Arabia's Yanbu Port.

Pharmaceuticals face squeeze

The crisis has also permeated the healthcare sector due to shortages of low-density polyethylene (LDPE), a petrochemical byproduct used in medical packaging. To prevent hoarding and artificial shortages, the government announced a ban on stockpiling of medical syringes and needles effective April 14, 2026, according to Korea JoongAng Daily. Major pharmaceutical firms have implemented strict purchasing controls to ensure stability. Yuhan Corporation (000100.KS) now requires head-of-sales approval for orders exceeding 500 units of IV fluids or 200 units of acetaminophen injections. Hanmi Pharmaceutical has capped shipments of automatic dispenser wrappers based on a pharmacy's average usage over the previous three months, while HK inno.N (195940.KQ) and JW Shinyak (067290.KQ) have also implemented shipment limits for IV fluid products.

The transition of the crisis from energy prices to raw material chokepoints marks a new phase of economic fallout. While the "June buffer" provides a temporary reprieve, the structural dependence on Qatari helium and Israeli bromine remains a primary concern for the Bank of Korea and global tech markets. As the war continues, the focus remains on whether these materials can be diversified fast enough to avoid a hard landing for the Korean export engine. For now, the industrial giants of Suwon and Hwaseong remain operational, but the rising spot prices of obscure industrial gases are being watched as closely as the price of Brent crude.

 

Making eco-friendly disinfectants from discarded wood! KIST develops high-efficiency carbon catalyst



Development of an eco-friendly carbon catalyst capable of producing hydrogen peroxide using waste lignin




National Research Council of Science & Technology

[Figure 1] Schematic diagram illustrating the synthesis process of lignin-based carbon catalysts 

image: 

This process involves using lignin, a sustainable biopolymer, as a precursor to form a cross-linked lignin structure via the Friedel-Crafts reaction, followed by a carbonization process to produce a lignin-based carbon catalyst. The composition of oxygen functional groups on the carbon surface varies depending on the carbonization temperature, and the selectivity for hydrogen peroxide production in the oxygen reduction reaction changes through the regulation of these functional groups. In particular, C=O functional groups induce high hydrogen peroxide selectivity, whereas OH functional groups tend to inhibit selectivity.

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Credit: Korea Institute of Science and Technology





Hydrogen peroxide, a versatile chemical used in a wide range of applications-from medical disinfectants to semiconductor manufacturing and water treatment-is an essential substance with global annual production exceeding tens of millions of tons. However, its production still relies on large-scale, energy-intensive facilities, and its transportation and storage involve high costs and significant safety management challenges. Recently, eco-friendly technologies that use electricity to directly produce hydrogen peroxide from water and oxygen have garnered attention; however, the catalytic performance and associated cost, which critically govern reaction efficiency, remain key barriers to practical implementation.

A research team led by Dr. Lee Young Jun of the RAMP Convergence Research Group at the Korea Institute of Science and Technology (KIST; President Oh Sang-rok), in collaboration with research teams led by Professor Yun Hongseok of Hanyang University and Professor Kang Junhee of Pusan National University, focused on lignin-a wood byproduct discarded in the timber industry-to overcome these limitations. The research team designed and developed a carbon-based catalyst capable of selectively generating hydrogen peroxide through electrochemical reactions using lignin, and demonstrated hydrogen peroxide production with a selectivity exceeding 95% under experimental conditions. This performance is comparable to that of conventional precious metal-based catalysts, and is significant in that it simultaneously achieves cost-effectiveness and high catalytic efficiency.

In particular, this study went beyond simply converting biomass into carbon materials; it applied a strategy to precisely control the fine chemical structure of the catalyst surface. The research team focused on the fact that the types and distribution of various oxygen functional groups on the catalyst surface have a decisive influence on the selectivity and efficiency of the hydrogen peroxide generation reaction. To verify this, they conducted experiments to gradually modulate the structure of the functional groups and selectively remove specific ones. As a result, they confirmed that this approach could suppress unnecessary reaction pathways and further enhance the hydrogen peroxide generation reaction.

Furthermore, by systematically analyzing the correlation between these surface chemical structures and reaction performance, they established design criteria for identifying which structural elements induce highly efficient reactions. This serves as a crucial fundamental principle that can be utilized in the design of catalysts for various electrochemical reactions in the future, and offers broad applicability across diverse sustainable chemical processes.

This achievement demonstrates the potential to convert waste biomass into high-value-added functional materials while also paving the way for energy-efficient, decentralized chemical production technologies. In particular, it is expected to contribute to the establishment of "on-site production" systems that generate hydrogen peroxide directly in the quantities needed at each location, thereby helping to reduce costs and improve safety across various industrial sectors, including water treatment, disinfection, and semiconductor manufacturing.

Lee Young Jun, a senior researcher at KIST, stated, "This is significant because we have developed a technology that efficiently produces hydrogen peroxide-an eco-friendly disinfectant-using waste wood byproducts," adding, "We plan to further enhance the catalyst's performance for application in various industrial settings."

 

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KIST was established in 1966 as the first government-funded research institute in Korea. KIST now strives to solve national and social challenges and secure growth engines through leading and innovative research. For more information, please visit KIST’s website at https://kist.re.kr/eng/index.do

This research was conducted with support from the Ministry of Science and ICT (Minister Bae Kyung-hoon) through the KIST Convergence Research Center Program (CRC23013-000), the Nano and Materials Technology Development Program (RS-2025-25442300), and the University-Based Research Center Support Program (2020R1A6A1A06046728). The findings of this study were published in the latest issue of the international journal *Applied Catalysis B: Environment and Energy* (IF 21.1, JCR field 0.6%).


[Figure 2] Comparison of Oxygen Functional Group Distribution and Electrochemical Performance of Lignin-Based Carbon Catalysts as a Function of Carbonization Temperature 

It was confirmed that the composition of oxygen-containing functional groups (C=O, C-O, O-C=O, etc.) on the carbon surface changes depending on the carbonization temperature of the lignin-based carbon catalyst. Furthermore, a comparison of the electrochemical specific surface area (ECSA), electron transfer number (n), hydrogen peroxide selectivity, and production rate for each catalyst revealed that the catalyst prepared at 900 °C exhibited high hydrogen peroxide production performance in the oxygen reduction reaction. (CCL3: Carbon catalyst prepared by carbonizing lignin at 300 °C; CCL6: Carbon catalyst prepared by carbonizing lignin at 600 °C; CCL9: Carbon catalyst prepared by carbonizing lignin at 900 °C; CCL12: Carbon catalyst prepared by carbonizing lignin at 1200 °C)

[Figure 3] Schematic diagram illustrating the electrochemical reaction system of H cells using lignin-based carbon catalysts and a comparison of their hydrogen peroxide production rate 

This figure schematically illustrates the electrochemical reaction in a hydrogen cell under oxygen-saturated conditions using a lignin-based carbon catalyst as the working electrode, showing the process by which hydrogen peroxide is generated through the oxygen reduction reaction. A comparison of the hydrogen peroxide production rate with various reported catalysts confirms that the catalyst developed in this study exhibits high hydrogen peroxide production performance.

(CCL9: Carbon catalyst prepared by carbonizing lignin at 900 °C; CCL9-BA: Carbon catalyst with selectively blocked -OH groups on the surface)

Credit

Korea Institute of Science and Technology