ZnCdS-BiFeO3 heterojunction loaded with cobalt catalyst boosting photoelectrocatalytic hydrogen evolution

IF 7.4 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Science China Materials Pub Date : 2025-01-02 DOI:10.1007/s40843-024-3215-2

Ling Wang (, ), Qing Lou (, ), Haixia Qian (, ), Xiaoshuang Yin (, ), Ying Liu (, ), Wenzhong Yang (, ), Hui Xu (, )

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Abstract

The advancement of a Z-scheme photoelectrochemical (PEC) system for hydrogen production and water splitting holds significant promise in addressing the escalating global energy crisis. In this study, a ternary Co-ZnCdS-BiFeO₃ Z-scheme composite photocatalyst was used. By optimizing the ratio of BiFeO₃/ZnCdS, the photocatalytic activity of the material is enhanced, while enhancing the electron transfer efficiency and strengthening the stability of the photoelectric cathode. The Co(dmgBF₂)2(H₂O)₂ was selected as the co-catalyst to further improve the electron-hole separation efficiency and photocorrosion resistance. Under visible light irradiation, the hydrogen production rate of the PEC system can reach 4.03 mmol g⁻¹ h⁻¹. Under optimal conditions, applying a bias voltage of −0.1 V vs. RHE can produce −38.5 µA cm⁻². The photocatalytic current density of is as high as 13 times that of pure ZnCdS, greatly improving the hydrogen production efficiency and stability of the photocatalyst. The study offers a novel benchmark for the development of a high efficiency Z-scheme photocatalyst designed for water splitting and provides new insights into intrinsic resistance through PEC analyses.

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负载钴催化剂的ZnCdS-BiFeO3异质结促进光电催化析氢

用于制氢和水分解的Z-scheme光电化学（PEC）系统的进展为解决不断升级的全球能源危机带来了重大希望。本研究采用Co-ZnCdS-BiFeO3 - Z-scheme三元复合光催化剂。通过优化BiFeO3/ZnCdS的配比，增强了材料的光催化活性，同时提高了电子传递效率，增强了光电阴极的稳定性。选择Co(dmgBF2)2(H2O)2作为助催化剂，进一步提高了电子空穴分离效率和光腐蚀性能。在可见光照射下，PEC体系的产氢速率可达4.03 mmol g−1 h−1。在最佳条件下，施加−0.1 V vs. RHE的偏置电压可以产生−38.5µa cm−2。其光催化电流密度高达纯ZnCdS的13倍，大大提高了光催化剂的产氢效率和稳定性。该研究为开发用于水分解的高效z型光催化剂提供了新的基准，并通过PEC分析提供了对内在阻力的新见解。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.