具有氧空位的纳米棒组成的CuBi2O4薄膜光电阴极实现高效稳定的太阳能水分解

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-10 DOI:10.1016/j.jallcom.2025.179673

Wenwu Zhu, Jiahe Li, Yiqing Wei, Minji Yang, Huichao He, Shaoguang Yang, Zhigang Zou, Yong Zhou

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引用次数: 0

摘要

理论上，在光电极中引入合适的氧空位可以通过调节光吸收或载流子分离和转移性质来提高其反应活性。本文制备了含氧空位（CuBi2O4(Ov)）的纳米棒CuBi2O4薄膜，并对其作为太阳能水分解的光电阴极进行了研究。相对于CuBi2O4光电阴极，由于氧空位的存在，CuBi2O4（Ov）光电阴极表现出更高的水还原活性和更快的动力学。在0 V vs. RHE下，CuBi2O4（Ov）光电阴极的水还原光电流为-1.5 mA cm-2，高于CuBi2O4光电阴极（-0.9 mA cm-2）。CuBi2O4（Ov）光电阴极具有良好的稳定性，连续反应12 h后其水还原活性无明显变化。机理研究表明，CuBi2O4（Ov）光电阴极具有较弱的载流子复合和较好的亲水性，使其能够有效地驱动太阳能减水。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Nanorods-composed CuBi2O4 Film Photocathodes with Oxygen Vacancies Achieving Efficient and Stable Solar Water Splitting

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Nanorods-composed CuBi2O4 Film Photocathodes with Oxygen Vacancies Achieving Efficient and Stable Solar Water Splitting

In theory, the introduction of suitable oxygen vacancies into photoelectrodes could improve their reaction activity, through regulating the light absorption or carrier separation and transfer properties. Herein, nanorods-composed CuBi₂O₄ films with oxygen vacancies (CuBi₂O₄(O_v)) were prepared and investigated as photocathodes for solar water splitting. Relative to CuBi₂O₄ photocathode, CuBi₂O₄(O_v) photocathode displayed higher water reduction activity and faster kinetics, because of the presence of oxygen vacancies. At 0 V vs. RHE, a water reduction photocurrent of -1.5 mA cm^-2 was achieved on the CuBi₂O₄(O_v) photocathode, which was higher than CuBi₂O₄ photocathode (-0.9 mA cm^-2). Additionally, the CuBi₂O₄(O_v) photocathode had impressive stability, its water reduction activity had no obvious change after 12 h of continuous reaction. Mechanism investigations revealed that weaker carrier recombination and better hydrophilicity be achieved on the CuBi₂O₄(O_v) photocathode, which enable it to drive solar water reduction efficiently.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.