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Earth & Climate

Breaking the Cost Barrier: Scientists Develop Revolutionary Catalyst for Hydrogen Fuel Production

Researchers in South Korea have developed a powerful and affordable new material for producing hydrogen, a clean energy source key to fighting climate change. By fine-tuning boron-doping and phosphorus levels in cobalt phosphide nanosheets, the team dramatically boosted the efficiency of both sides of water-splitting reactions. This advancement could unlock scalable, low-cost hydrogen production, transforming how we generate clean fuel.

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Breaking the Cost Barrier: Scientists Develop Revolutionary Catalyst for Hydrogen Fuel Production

Hydrogen fuel has long been touted as a clean energy source with zero carbon content and higher energy density than gasoline. One promising method to produce hydrogen is electrochemical water-splitting, which uses electricity to break down water into hydrogen and oxygen. However, large-scale production of hydrogen using this method remains unfeasible due to the need for expensive rare earth metal catalysts.

Researchers have been exploring more affordable alternatives, such as transition metal phosphides (TMPs), which have shown promise as catalysts for the hydrogen generating side of the process. However, they struggle in the oxygen evolution reaction (OER), reducing overall efficiency. Recent studies suggest that Boron (B)-doping into TMPs can enhance both HER and OER performance, but making such materials has been a challenge.

A recent breakthrough by a research team led by Professor Seunghyun Lee from Hanyang University ERICA campus in South Korea has developed a new type of tunable electrocatalyst using B-doped cobalt phosphide (CoP) nanosheets. This innovative material outperforms conventional electrocatalysts, making it suitable for large-scale hydrogen production.

The researchers used an innovative strategy to create these materials by growing cobalt-based metal-organic frameworks (MOFs) on nickel foam and then subjecting them to a post-synthesis modification reaction with sodium borohydride, followed by phosphorization using different amounts of sodium hypophosphite. This resulted in the formation of three different samples of B-doped cobalt phosphide nanosheets, all of which exhibited excellent OER and HER performance.

Experiments revealed that these materials had a large surface area and mesoporous structure, key features that improve electrocatalytic activity. The sample made using 0.5 grams of sodium hypophosphite demonstrated the best results, with overpotentials of 248 and 95 mV for OER and HER, respectively, much lower than previously reported electrocatalysts.

An alkaline electrolyzer developed using these electrodes showed a cell potential of just 1.59 V at a current density of 10 mA cm-2, lower than many recent electrolyzers. At high current densities above 50 mA cm-2, it even outperformed the state-of-the-art RuO2/NF(+) and 20% Pt-C/NF(−) electrolyzer, while also demonstrating long-term stability.

Density functional theory (DFT) calculations supported these findings and clarified the role of B-doping and adjusting P content. The team’s findings offer a blueprint for designing and synthesizing next-generation high-efficiency catalysts that can drastically reduce hydrogen production costs.

“Our findings offer an important step towards making large-scale green hydrogen production a reality, which will ultimately help in reducing global carbon emissions and mitigating climate change,” says Prof. Lee.

Earth & Climate

“Unveiling the Invisible: Scientists Capture High-Resolution Images of Wind-Wave Interactions on the Open Ocean”

A laser-equipped research platform has, for the first time, photographed airflow just millimeters above ocean waves, revealing two simultaneous wind–wave energy-transfer tricks—slow short waves steal power from the breeze, while long giants sculpt the air in reverse. These crisp observations promise to overhaul climate and weather models by clarifying how heat, momentum, and greenhouse gases slip between sea and sky.

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Scientists from the Hereon Institute of Coastal Ocean Dynamics have made a groundbreaking discovery by capturing high-resolution images of the ocean surface using a specially developed laser measurement system. Led by Dr. Marc Buckley, the team has successfully mapped the interactions between wind and waves on the open ocean, shedding new light on the complex mechanisms that control energy exchange between the atmosphere and the ocean.

Using Particle Image Velocimetry (PIV), an established technique in fluid dynamics, the researchers were able to visualize both the air and water sides of the ocean surface. The laser beam passed through both media, illuminating tiny droplets suspended in the air above the water. This allowed the team to capture precise information about flow structure and wind speeds.

The breakthrough findings reveal two distinct wind-wave coupling mechanisms that occur simultaneously but operate differently. Short waves, approximately one meter in length, move slower than the wind, creating a pressure difference that transfers energy to the wave. Long waves, up to 100 meters in length, move faster than the wind and generate different airflow patterns through their motion.

These discoveries have significant implications for advancing atmospheric and oceanic models. The interactions between wind and waves are a central component of the Earth’s climate and weather systems, controlling the exchange of energy, heat, and greenhouse gases between the atmosphere and the ocean.

The research team plans to further develop the system to capture movements below the water surface with greater precision. This cutting-edge research aims to preserve a world worth living in by generating knowledge and researching new technologies for greater resilience and sustainability – for the benefit of the climate, the coast, and people.

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Diabetes

The Hidden Cost of Climate Change: A Threat to Food Quality and Human Health

Climate change is silently sapping the nutrients from our food. A pioneering study finds that rising CO2 and higher temperatures are not only reshaping how crops grow but are also degrading their nutritional value especially in vital leafy greens like kale and spinach. This shift could spell trouble for global health, particularly in communities already facing nutritional stress. Researchers warn that while crops may grow faster, they may also become less nourishing, with fewer minerals, proteins, and antioxidants raising concerns about obesity, weakened immunity, and chronic diseases.

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The article highlights the crucial aspect of climate change that has often been overlooked – its impact on the nutritional quality of food crops. Rising CO2 levels and hotter temperatures can lead to a reduction in key minerals like calcium and certain antioxidant compounds, making the crops less healthy. This is not just a problem for farmers but also for consumers, as it can lead to diets that are higher in calories but poorer in nutritional value.

The research, led by Jiata Ugwah Ekele, a PhD student at Liverpool John Moores University, UK, used environment-controlled growth chambers to simulate the UK’s predicted future climate scenarios. The crops were grown under different conditions, and their nutritional quality was analyzed using high-performance liquid chromatography (HPLC) and X-Ray Fluorescence profiling.

The preliminary results suggest that elevated levels of atmospheric CO2 can help crops grow faster and bigger but certainly not healthier. The interaction between CO2 and heat stress had complex effects – the crops did not grow as big or fast, and the decline in nutritional quality intensified.

This research has serious implications for human health and wellbeing. The altered balance of nutrients in crops could contribute to diets that are higher in calories but poorer in nutritional value, leading to greater risks of obesity and type 2 diabetes, particularly in populations already struggling with non-communicable diseases.

Crops with poor nutritional content can also lead to deficiencies in vital proteins and vitamins that compromise the human immune system and exacerbate existing health conditions – particularly in low or middle-income countries.

The research highlights the importance of studying multiple stressors together and emphasizes that we cannot generalize across crops. Different species react differently to climate change stressors, making it essential to study each crop individually.

This research is not just about food production but also about human development and climate adaptation. It’s essential to think holistically about the kind of food system we’re building – one that not only produces enough food but also promotes health, equity, and resilience.

The findings of this research are being presented at the Society for Experimental Biology Annual Conference in Antwerp, Belgium on July 8th, 2025. The researchers are open to collaborating further on this project with the wider research community, including those from agriculture, nutrition, and climate policy.

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Air Quality

The Hidden Threat: How Feral Honey Bees Are Displacing Native Bees in Southern California

Feral honey bees, once celebrated for their agricultural value, are now threatening native ecosystems in Southern California by monopolizing pollen sources and overwhelming native pollinators. A new study reveals they remove up to 80% of pollen in a single day, severely disrupting food sources for over 700 species of native bees. Despite their benefits to agriculture, these invasive bees dominate nearly all bee biomass in the region and even produce lower-quality offspring when pollinating native plants. The findings urge conservationists to rethink beekeeping practices, especially near threatened bee populations and natural preserves.

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The majority of the Earth’s plant species rely on animal pollinators to reproduce, and our modern agricultural industry is heavily reliant on honey bees. Feral honey bees, which are non-native and often escape human management, can perturb native ecosystems when they become abundant. A new study by University of California San Diego biologists is calling attention to the threat posed by these feral honey bees to native pollinators in Southern California.

The researchers found that honey bees remove about 80% of pollen during the first day a flower opens, leaving scant resources for native bees. If the pollen and nectar used to create honey bee biomass were instead converted to native bees, populations of native bees would be expected to be roughly 50 times larger than they are currently.

While public concern often focuses on the plight of the honey bee, researchers say that such a level of honey bee exploitation is not well documented. This can pose an additional and important threat to native bee populations in places where honey bees have become abundant.

The study used pollen-removal experiments to estimate the amount of pollen extracted by honey bees using three common native plants as targeted pollen sources. The researchers found that just two visits by honey bees removed more than 60% of available pollen from flowers of all three species.

One step to address this situation could be increased guidance on whether and where large-scale contract beekeepers are allowed to keep their hives on public lands after crops have bloomed, to limit opportunities for honey bees to outcompete native species for scarce resources provided by native vegetation.

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