Articles tagged with Electrocatalysis
The article provides an overview of the research progress on metal-based electrocatalysts for ammonia electro-oxidation reaction, proposing strategies to enhance performance and inhibit side reactions. The study highlights the opportunities and challenges faced by ammonia electrocatalysis and its development trend.
ICIQ researchers observe the direct impact of external magnetic fields on the oxygen evolution reaction during water electrolysis to produce green hydrogen. The magnetic field enhances kinetics by favoring larger accumulation of active NiOOH species at the electrode surface.
Researchers developed an AI technique to expedite the identification of high-performance water electrolyzer electrode materials free of platinum-group elements. These materials can be synthesized using relatively cheap and abundant metallic elements, exhibiting superior electrochemical properties.
Researchers develop defect engineering strategies to improve LDH-based electrocatalysts for water electrolysis. The techniques boost conductivity and active sites, overcoming the material's drawbacks.
Researchers introduced three strategies to enhance catalytic performance of Ni SACs, including support structure modification and surface treatment. The article highlights the potential of Ni SACs in controlling product distribution and reducing cost, while also discussing existing challenges and future development outlook.
Researchers developed a modified RuO2 catalyst with bismuth doping to enhance the anode oxygen evolution reaction's activity and stability. The Bi-doped RuO2 catalyst shows improved electron transfer and electroconductibility, leading to lower activation energy and higher performance.
Researchers from City University of Hong Kong developed a novel strategy to engineer stable and efficient ultrathin nanosheet catalysts using Turing structures. This approach effectively resolves the instability problem associated with low-dimensional materials in catalytic systems, enabling efficient and long-lasting hydrogen production.
A team of scientists from Ruhr-University Bochum and the Fraunhofer Institute has developed a novel catalyst system for converting carbon dioxide into raw materials. The system, which uses homogeneous electrocatalysts, can efficiently convert CO2 under industrial conditions and maintains stability over 100 hours without decay.
Researchers at Tohoku University have developed an integrated approach to discovering stable and low-cost electrocatalysts, using data mining to accelerate the transition to renewable energy. The study identified 68 promising metal oxide electrocatalysts under specific conditions, including Sb2WO6 for oxygen reduction.
A new method has been developed to produce green hydrogen more efficiently and cheaply, using ruthenium particles and a solar-powered electrolytic system. The technology could reduce the costs of green hydrogen production on an industrial scale.
Researchers developed a novel laser-induced hydrothermal reaction method to grow binary metal oxide nanostructures and layered-double hydroxides on nickel foams. This technique improves the production rate by over 19 times while consuming only 27.78% of the total energy required by conventional methods.
Researchers have developed a Sn-based tandem electrocatalyst that can reproducibly yield ethanol with high Faradaic efficiency and selectivity. The catalyst enables the formation of C-C bonds through an unprecedented pathway, producing desired products such as ethanol.
Researchers will investigate high-entropy materials to create more sustainable and durable catalysts. The goal is to improve the efficiency of electrocatalysis, paving the way for a new generation of catalysts and reducing the reliance on rare and expensive materials.
Researchers developed an autonomous measurement algorithm to optimize electrical resistance measurements in materials libraries. The new approach enables faster characterization of materials by actively selecting the next measurement area.
A team of scientists constructed micro-mesoporous metal-organic framework and carbon nanotube-based composite catalysts showing excellent oxygen reduction reaction electrocatalytic activity. The presence of MNx sites was found responsible for the enhanced electrocatalytic activity.
A team of researchers elucidated how hydrogen peroxide affects the degradation of a carbon-based catalyst named N-G/MOF. The study examined changes in the catalyst's elemental composition, major chemical bonds, crystal structure, and morphology under varying concentrations of hydrogen peroxide.
Researchers developed atomic Ru electrocatalysts with regulated spatial distribution and electronic structure in V-doped tungsten bronze, exhibiting remarkable HER performance. The unique integration of atomic Ru promotes tight interaction with the material, enhancing HER activity.
A research team at City University of Hong Kong has developed a highly efficient electrocatalyst that enhances hydrogen generation through electrochemical water splitting. The catalyst, composed of transition-metal dichalcogenide nanosheets with unconventional crystal phases, exhibits superior activity and stability in acidic media.
A team from Chiba University created an AuNi alloy on Au electrodes, showing increased hydrogen evolution reaction activity due to surface defects formed through Ni dealloying. The study used X-ray photoelectron spectroscopy and surface X-ray diffraction techniques to analyze the surface properties of the AuNi/Au catalyst.
A collaborative research team created an experimental platform to control the atomic-level structure of high-entropy alloy surfaces and test their catalytic properties. Their study found that the surfaces performed better in oxygen reduction reactions compared to other materials, indicating a 'pseudo-core-shell-like structure' contribu...
The study introduces a highly active catalyst for alkaline water electrolysis using typical elements, including rhombohedral boron monosulfide complexed with graphene nanoplatelets. This novel material exhibits high catalytic activity for oxygen evolution reactions, paving the way for sustainable hydrogen production.
Ni-based catalysts have shown promising performance in the electrooxidation of methanol in alkaline media due to their anti-poisoning ability and high oxidation kinetics. The development of new Ni-based catalysts with varied structures has improved catalytic performance, offering a more sustainable alternative to traditional noble meta...
Researchers have identified and fabricated a new electrocatalyst using theoretical predictions, significantly improving the oxygen evolution reaction. The discovery uses cerium-doped cobalt oxide to achieve an overpotential of only 261 mV at 10 mA cm−2, outperforming individual cobalt oxide.
Researchers at USTC developed a novel catalyst synthesis strategy to optimize hydrogen evolution reaction (HER) activity and stability. The strategy involves adjusting the electronic structure of CoSe2 nanobelts, resulting in high-efficiency HER performance similar to commercial Pt/C catalysts.
Researchers at Dalian Institute of Chemical Physics have developed an air-breathing cathode for alkaline nickel-zinc batteries, improving cycling stability and energy efficiency. The novel battery exhibits ultra-long lifespan and high energy efficiency, surpassing conventional Ni-Zn batteries.
The review summarizes the recent progress of Li-eN2 RR, covering reaction mechanisms, catalysts developed, and electrolytes involved. It highlights the challenges and possible resolving strategies in the field. The study also discusses the importance of rational design of electrocatalysts and electrolytes for efficient NH3 production.
Research has shown that MOFs can enhance electrocatalytic performance by regulating the energy of reaction intermediates and adsorption strength. Strategies to design stable and conductive MOFs are crucial for commercialization.
A research team reviewed recent electrochemical CO₂ reduction with ionic liquids, focusing on C1 products like CO, CH₃OH, CH₄, and syngas. They found that CO is the only profitable product among the studied options, while others are too costly.
Researchers explored multicomponent electrocatalysts for activating and converting inert bonds in CO2 and N2. Three models were developed: Type I, II, and III, offering advantages in stability, activity, and reaction processes. Future directions involve scaling up and integrating these processes into industrial applications.
Researchers have successfully developed chemically stable, tunable-bandgap 2D nanosheets from perovskite oxynitrides, opening new possibilities for sustainable technologies such as photocatalysis, electrocatalysts, and electronics. The nanosheets exhibit superior proton conductivity and excellent photocatalytic activity.
Researchers have developed a new approach to correlative atomic force microscopy, allowing for the simultaneous measurement of electrocatalyst properties. This study focuses on nanostructured copper-gold electrocatalysts and provides insights into catalyst-electrolyte interfaces, enabling targeted optimization.
Researchers have developed high-performance, low-cost electrocatalysts through defect engineering to improve metal-based battery efficiency. The review highlights strategies for introducing defects into electrode materials and characterization technologies, as well as design principles for optimizing electrochemical performance.
Researchers developed a method for creating cobalt/carbon nanocomposites using magnetic induction heating, which significantly enhances the oxygen evolution reaction performance. The new synthesis method produces high-performance electrocatalysts with low overpotentials and high current densities.
Scientists at Helmholtz-Zentrum Berlin examined the chemistry of Cobalt-Iron Oxyhydroxides using X-ray absorption spectroscopy. They discovered that iron is present in higher oxidation states than previously thought, which could lead to improved electrocatalysts for water splitting and carbon dioxide reduction.
Researchers have made significant progress in developing high-performance Pt-based nanocatalysts for oxygen reduction reactions, focusing on increasing activity per site and active sites. The study aims to reduce the cost of PEMFCs by overcoming the challenges associated with Pt metal catalysts.
Researchers at Berkeley Lab have developed a new technique that captures real-time movies of copper nanoparticles as they convert carbon dioxide into renewable fuels and chemicals. The study reveals that metallic copper nanograins serve as active sites for CO2 reduction, paving the way for advanced solar fuel technology.
A new study by the University of Illinois at Urbana-Champaign demonstrates an approach for integrated capture and conversion of nitrate-contaminated waters into valuable ammonia using a single electrochemical cell. The device shows significant enhancements in energy efficiency, nitrate removal, and ammonium production rate compared to ...
Researchers investigated NiFe-based catalysts for water oxidation in different pH electrolytes, revealing a clear pH-dependent OER activity. The study found that forming high-valent Ni3+ and Fe4+ species requires higher potential in neutral and near-neutral conditions compared to alkaline conditions.
Scientists reveal phase-transition-temperature-dependent structure evolution process of intermetallic compounds, a crucial step in synthesizing efficient fuel cell electrocatalysts. The research provides a guideline to optimize alloying and ordering processes, leading to improved particle sizes and catalytic activity.
Researchers demonstrate that a dual-site cooperative catalytic mechanism on Ru-S-C single-atom catalyst significantly enhances electrochemical nitrogen reduction. The Ru/S dual site facilitates the activation and first protonation of N2 in the rate-determining step, leading to improved activity and selectivity.
Researchers have developed a nano-scale platinum-cobalt alloy to reduce the need for rare and expensive platinum in hydrogen fuel cells, enhancing performance and stability. The new alloy achieves superior results at lower costs, paving the way for wider adoption of fuel-cell technology.
Researchers have developed new electrocatalysts using theoretical guidance, accelerating the process and improving performance. Key findings include structural-activity laws and descriptors for catalyst activity.
This study uses ultra-pH-sensitive polymeric fluorescent probes to image local pH changes in electrocatalytic processes with subsecond resolution. The technique allows for rapid imaging of proton concentration changes, enabling the study of heterogeneous reactions and mass transport in electrocatalysis.
Researchers developed an asymmetric electrochemical radical functionalization method for alkenes and allylation, achieving high selectivity. The approach enables efficient organic synthesis, paving the way for exploring new chemical spaces.
Researchers from City University of Hong Kong developed a new ultra-stable hydrogen evolution reaction electrocatalyst based on two-dimensional mineral gel nanosheets. The catalyst exhibits excellent electrocatalytic activity and long-term durability, with an overpotential of only 38.5 mV at 10 mA cm−2.
Scientists developed a method to control the synthesis of single-atom catalysts, enabling the creation of bimetallic Fe-Co electrocatalysts with desired properties. These catalysts showed superior ammonia yield rates and faradaic efficiency under electrocatalytic nitrogen reduction reaction conditions.
Researchers at Johannes Gutenberg University Mainz develop an electrochemical technique to recover halogens without burning carbon structures, reducing emissions and stabilizing energy supplies. The project aims to contribute to a circular economy of halogens and reduce dependence on fossil reserves.
A KAUST-led team creates selective anode catalysts for stable and efficient hydrogen evolution in seawater splitting. The nanoreactors exhibited high electrocatalytic activity and stability due to their unique structure, isolating the electrolysis from side reactions.
Researchers at UNIST developed superaerophobic polyethyleneimine hydrogels to improve electrochemical hydrogen production by promoting bubble detachment. These hydrogels can be easily coated on electrodes, allowing for controlled pore size and porosity, leading to enhanced performance.
Researchers at Helmholtz-Zentrum Berlin for Materials and Energy are utilizing X-ray absorption spectroscopy to investigate oxygen evolution in electrocatalysis. This study aims to improve the efficiency of green hydrogen production by developing more stable and cost-effective catalysts.
Researchers in China designed a strategy to improve zinc-air battery performance by combining two transition metals, atomic iron and nickel, which deliver high electrocatalytic activity. The resulting rechargeable batteries achieve high peak power density, working rates, and long lifespan.
Researchers introduced a new method to analyze dynamic processes in photoelectrocatalytic reactions using carbon dots. The technique, TPV technology, provides detailed information on charge transfer and reaction kinetics, enabling the discovery of new catalytic properties.
Researchers develop TiO2-δNδ nanowire arrays to enhance N2 reduction to ammonia, achieving high yields and efficiency. The study demonstrates synergistic effects of oxygen vacancies and titanium ions in improving electrocatalytic performance.
Researchers at KAUST have found that molybdenum plays a central role in electrochemical hydride transfer, a process for producing valuable chemicals or carbon-free fuels. The discovery could enable more sustainable production of sustainable fuels and chemicals.
Engineers at UIC have been awarded a grant to build a system that selectively removes and destroys PFAS, commonly called 'forever chemicals,' from industrial and municipal wastewaters. The team will develop a prototype of their system and deploy it for scale-up and pilot testing in California's Orange County Water District.
Researchers discovered Bi2O3 nanoparticles transform into active phase Bi/Bi2O3 nanosheets, showing enhanced catalytic performance and stability. Theoretical calculations support the role of surface-exposed Bi in promoting formate production.
Researchers developed a novel graphene-based NiSe2 nanocrystalline array that significantly enhances the efficiency of hydrogen evolution reactions. The composite material achieves an overpotential of 158 mV and exhibits extremely stable performance, providing a promising approach for the development of high-efficiency electrocatalysts.
Researchers developed a technique to synthesize porous carbon nanosheets from metal-organic frameworks, preserving catalytically active sites. The resulting nanosheets exhibit high performance in energy conversion and storage applications, including oxygen reduction reaction activities.
Scientists have developed artificial photosynthesis to produce food in the dark, bypassing sunlight's need. This technology converts CO2, electricity, and water into acetate, a key component of vinegar, boosting food production's conversion efficiency up to 18 times.
Researchers investigated well-defined metal-organic ensembles for efficient carbon dioxide reduction, highlighting the importance of structural engineering and metal center tuning. The study aims to inspire design and fabrication of high-performance CO2 reduction electrocatalysts.