Ultra-thin FeVO4 modified Al-doped ZnO nanorods photoanode towards efficient photoelectrochemical water oxidation

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL Journal of Electroanalytical Chemistry Pub Date : 2024-11-12 DOI:10.1016/j.jelechem.2024.118790

Ruyi Wang , Caiyun Chen , Yuxin Kan , Wenjun Fang , Xingzhi Li , Lingling Wang , Yong Jia

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Abstract

Fabricating of high-performance photoanodes played an important role in achieving efficient conversion of solar energy to hydrogen energy. Herein, Al-ZnO/FeVO₄ core–shell nanorods arrays (NRs) was constructed through a simple two-step method to form type-II heterojunction. Compared with the Al-ZnO substrate (0.55 mA/cm²), the modified Al-ZnO/FeVO₄ photoanode exhibited superior photocurrent density, with an optimal photocurrent density of 1.13 mA/cm² at 1.23 V vs. RHE (AM 1.5G). Heterogeneous structures suppressed the photoinduced bulk recombination of charge carriers and improved the separation efficiency of charge carriers. More importantly, the ultra-thin FeVO₄ modification layer weakened surface capture states, increased photovoltage, and promoted interfacial charge transfer dynamics. This work provided new ideas for designing high-performance photoanodes.

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实现高效光电化学水氧化的超薄 FeVO4 改性铝掺杂氧化锌纳米棒光电阳极

制备高性能光阳极对于实现太阳能到氢能的高效转化具有重要作用。本文通过简单的两步法构建了Al-ZnO/FeVO4核壳纳米棒阵列（NRs），形成了II型异质结。与 Al-ZnO 衬底（0.55 mA/cm2）相比，改进后的 Al-ZnO/FeVO4 光阳极表现出更高的光电流密度，在 1.23 V 对 RHE（AM 1.5G）电压下，最佳光电流密度为 1.13 mA/cm2。异质结构抑制了光诱导的电荷载流子大量重组，提高了电荷载流子的分离效率。更重要的是，超薄 FeVO4 修饰层削弱了表面俘获态，提高了光电压，并促进了界面电荷转移动力学。这项工作为设计高性能光阳极提供了新思路。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.