Recent Advances in Co‐Based Electrocatalysts for Hydrogen Evolution Reaction

Small, Год журнала: 2023, Номер 19(45)

Опубликована: Июль 11, 2023

Abstract Water splitting is a promising technique in the sustainable “green hydrogen” generation to meet energy demands of modern society. Its industrial application heavily dependent on development novel catalysts with high performance and low cost for hydrogen evolution reaction (HER). As typical non‐precious metal, cobalt‐based have gained tremendous attention recent years shown great prospect commercialization. However, complexity composition structure newly‐developed Co‐based make it urgent comprehensively retrospect summarize their advance design strategies. Hence, this review, mechanism HER first introduced possible role Co component during electrocatalysis discussed. Then, various strategies that could effectively enhance intrinsic activity are summarized, including surface vacancy engineering, heteroatom doping, phase facet regulation, heterostructure construction, support effect. The progress advanced electrocatalysts discussed, emphasizing above can significantly improve by regulating electronic optimizing binding crucial intermediates. At last, prospects challenges according viewpoint from fundamental explorations applications.

Язык: Английский

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Spinel‐Structured High‐Entropy Oxide Nanofibers as Electrocatalysts for Oxygen Evolution in Alkaline Solution: Effect of Metal Combination and Calcination Temperature

Advanced Functional Materials, Год журнала: 2023, Номер 34(6)

Опубликована: Окт. 22, 2023

Abstract Defect‐engineering is a viable strategy to improve the activity of nanocatalysts for oxygen evolution reaction (OER), whose slow kinetics still strongly limits broad market penetration electrochemical water splitting as sustainable technology large‐scale hydrogen production. High‐entropy spinel oxides (HESOs) are in focus due their great potential low‐cost OER electrocatalysts. In this work, electrospun HESO nanofibers (NFs), based on (Cr,Mn,Fe,Co,Ni), (Cr,Mn,Fe,Co,Zn) and (Cr,Mn,Fe,Ni,Zn) combinations, with granular architecture oxygen‐deficient surface produced by calcination at low temperature (600 or 500 °C), characterized combination benchtop analytical techniques evaluated electrocatalysts alkaline medium. The variation composition produces complex interdependent changes morphology fibers, crystallinity inversion degree oxide, concentration oxygen‐vacancies, cation distribution lattice, which mirror different properties fibers. best electrocatalytic performance (overpotential Tafel slope 10 mA cm −2 : 360 mV 41 dec −1 , respectively) pertains (Cr 1/5 Mn Fe Co Ni ) 3 O 4 NFs calcined °C results from lower outer 3d‐electron number, e g filling closer its optimal value higher occupation 16 d sites most redox‐active species.

Язык: Английский

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Electrocatalytic NO Reduction to NH₃ on Mo₂C Nanosheets

Inorganic Chemistry, Год журнала: 2023, Номер 62(2), С. 653 - 658

Опубликована: Янв. 3, 2023

Electrocatalytic reduction of NO to NH3 (NORR) emerges as a promising route for achieving harmful treatment and sustainable generation. In this work, we first report that Mo2C is an active selective NORR catalyst. The developed nanosheets deliver high yield rate 122.7 μmol h-1 cm-2 with Faradaic efficiency 86.3% at -0.4 V. Theoretical computations unveil the surface-terminated Mo atoms on can effectively activate NO, promote protonation energetics, suppress proton adsorption, resulting in activity selectivity Mo2C.

Язык: Английский

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Potential technology for seawater electrolysis: Anion-exchange membrane water electrolysis

Chem Catalysis, Год журнала: 2023, Номер 3(7), С. 100643 - 100643

Опубликована: Май 25, 2023

Язык: Английский

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High-entropy alloys in water electrolysis: Recent advances, fundamentals, and challenges

Science China Materials, Год журнала: 2023, Номер 66(5), С. 1681 - 1701

Опубликована: Март 27, 2023

Язык: Английский

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