Electrocatalysis

In Situ Electron Microscopy Study of Dynamic Structural Changes in CuZn Bimetallic Nanoparticles

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In Situ Electron Microscopy Study of Dynamic Structural Changes in CuZn Bimetallic Nanoparticles

Background Introduction Bimetallic nanocomposites have gained widespread attention due to their tunable physicochemical properties and significant applications in engineering and catalysis. In nanocomposites, the synergistic effects between metal elements often lead to excellent catalytic performance, even imparting unique properties that are not present in single metal elements. However, bimetallic alloys face issues of structural and … Read more

Co-Porphyrin-Based Covalent Organic Frameworks for O2 Reduction

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Co-Porphyrin-Based Covalent Organic Frameworks for O2 Reduction

Introduction Recently, Professor Luis Echegoyen and others from the University of Texas at El Paso reported two covalent organic frameworks (COFs) based on Co(II)-porphyrin/[2,1,3]-benzothiadiazole (BTD), namely Co@rhm-PorBTD and Co@sql-PorBTD, and used them for O2 electrocatalytic reduction (ORR). The results show that both COFs exhibit 5.8 times (Co@rhm-PorBTD) and 1.3 times (Co@sql-PorBTD) higher mass activity compared … Read more

Regulating Oxygen Vacancy Concentration Activates Inert 2D Bi₂O₃ Nanosheets for Efficient HER

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Regulating Oxygen Vacancy Concentration Activates Inert 2D Bi₂O₃ Nanosheets for Efficient HER

The oxygen vacancy (Vo) is closely related to the activity of hydrogen evolution reaction (HER) in electrocatalysts. However, the role of vacancy defects and their concentration effects remain unclear. Here, we selected Bi₂O₃ as a model, which is an unfavorable electrocatalyst for HER due to its non-ideal Gibbs free energy of hydrogen adsorption (ΔGₕ), to … Read more

Electrochemical Reduction of CO2 to C2+ Products Using Copper-Based Catalysts

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Electrochemical Reduction of CO2 to C2+ Products Using Copper-Based Catalysts

As the destructive carbon cycle is blamed for global warming, the feasible electrochemical reduction of carbon dioxide (CO2RR) to form valuable C2+ hydrocarbons and feedstocks has become a hot topic. In this regard, copper-based catalysts have proven to be excellent choices for producing high-energy value-added products through CO2RR. However, the selectivity for C2+ products achieved … Read more

Temperature-Driven Phase Transition and Element Segregation in Pd-Ru Nanoparticles

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Temperature-Driven Phase Transition and Element Segregation in Pd-Ru Nanoparticles

Bimetallic alloys can form three typical structures, including solid solution, heterogeneous structure, and intermetallic compounds, depending on the interactions between identical and different atoms. Although this trend can be predicted through the types of binary phase diagrams, different synthesis methods can trap the system in various dynamical intermediates between these three typical structures. Here, we … Read more

Te-Mediated Electrochemical Oxygen Evolution Reaction

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Te-Mediated Electrochemical Oxygen Evolution Reaction

In the 21st century, the rapid development of human society has led to an increasing demand for green energy. Hydrogen energy, obtained through the complete decomposition of water, is not only environmentally friendly but also holds promise in addressing the intermittency issues of new energy sources. However, the slow kinetics and high overpotential of the … Read more

High-Performance Redox Catalysts from Copolymer-Anchor Multimetallic Oxoacids

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High-Performance Redox Catalysts from Copolymer-Anchor Multimetallic Oxoacids

In the field of electrocatalysis, developing and synthesizing cathode electrocatalysts for metal-air batteries with high activity and long-term stability is a significant challenge.This article presents a novel in-situ nitridation and phosphidation strategy using phosphotungstic acid (HPW)-polyaniline-phytic acid-Fe3+ organic-inorganic hybrid materials to prepare W3N4 and WP.The resulting materials feature a three-dimensional porous framework, with a W3N4-WP … Read more

Efficient Electrocatalytic Hydrogen Evolution Using HEAs

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Efficient Electrocatalytic Hydrogen Evolution Using HEAs

High-entropy alloys (HEAs) have become promising candidate materials for hydrogen evolution reaction (HER) electrocatalysts due to their unique cocktail electronic effect and lattice distortion effect. In this study, ultra-small (less than 2 nanometers) nanoparticles of PtRuCoNiCu HEA were highly dispersed on hierarchical nitrogen-doped carbon nanocages (hNCNC) through a low-temperature thermal reduction method, referred to as … Read more

Enhancing Electrocatalytic Nitrogen Oxidation to Nitrate Using MXene-Derived TiO2−x Modified Copper Nanowires

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Enhancing Electrocatalytic Nitrogen Oxidation to Nitrate Using MXene-Derived TiO2−x Modified Copper Nanowires

Green synthesis of nitrates (NO3−) through the electrocatalytic nitrogen oxidation reaction (NOR) is a promising artificial nitrogen fixation strategy, showing significant advantages over traditional nitrate synthesis methods based on the Haber-Bosch process and the Oswald process. However, the poor absorbability of nitrogen, the high bond energy of N≡N (941 kJ·mol−1), and the competing multi-electron transfer … Read more

Phosphorus-Tuned Nickel Boride Nanocatalysts For Lithium-Sulfur Batteries

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Phosphorus-Tuned Nickel Boride Nanocatalysts For Lithium-Sulfur Batteries

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