氧化氮化铜- bivo4复合材料的合理设计及其析氢、析氧反应性能

IF 9.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materials Chemistry A Pub Date : 2025-08-05 DOI:10.1039/d5ta03745j

Santhosh Kumar Jayaraj, Seungmin Yu, Muthu Austeria, Radhakrishnan Sivaprakasam, Arvind H. Jadhav, Sakar Mohan, Byoung-Suhk Kim

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引用次数: 0

摘要

本研究探讨了氧化氮化铜（CuON）与钒酸铋（BiVO₄）的整合，以改善在1 M KOH条件下氢氧析出反应（HER/OER）的高效双功能电催化剂。结构和化学分析证实了CuON-BiVO₄复合材料的成功构建。电化学研究表明，与单个组分相比，HER的过电位（47 mV）和OER的过电位（460 mV）更低，Tafel斜率（85和65 mV/dec）更高，具有优异的催化性能。电化学表面积的提高和电荷转移电阻的降低（~7.5 Ω）表明电荷传输效率提高。CuON-BiVO₄催化剂表现出优异的耐久性，可保持24小时的稳定性能。CuON-BiVO₄|| CuON-BiVO₄电解质为双功能电极，需用1.68 V, 10ma cm⁻²。这些结果强调了CuON和BiVO₄之间的协同作用，为可持续制氢提供了一种经济、耐用的催化剂，并推动了下一代水分解系统的发展。

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Rational Design of Cu Oxynitride-BiVO4 Composites for Enriched Bifunctional Electrocatalysts for Hydrogen and Oxygen Evolution Reaction Performances

This study explores the integration of copper oxynitride (CuON) with bismuth vanadate (BiVO₄) to improve an efficient bifunctional electrocatalyst for hydrogen and oxygen evolution reactions (HER/OER) in 1 M KOH. Structural and chemical analyses confirmed the successful construction of the CuON-BiVO₄ composite. Electrochemical studies showed superior catalytic performance with lower overpotentials (47 mV for HER, 460 mV for OER) and improved Tafel slopes (85 and 65 mV/dec) compared to individual components. Improved electrochemical surface area and reduced charge transfer resistance (~7.5 Ω) indicated efficient charge transport. The CuON-BiVO₄catalyst demonstrated excellent durability, maintaining stable performance for 24 hours. As a bifunctional electrode, the CuON-BiVO₄ || CuON-BiVO₄ electrolyzer required 1.68 V for 10 mA cm⁻². These results highlight the synergistic interaction between CuON and BiVO₄, offering a cost-effective, durable catalyst for sustainable hydrogen production and advancing next-generation water-splitting systems.

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来源期刊

Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

19.50

自引率

5.00%

发文量

1892

审稿时长

1.5 months

期刊介绍： The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.