Abstract In this article, we propose a scheme using the conformal coating of p-NiOx nanoparticles on the n-GaN photoanode to prevent the photoelectrodes from corrosion and thereby enhance conversion efficiency. Furthermore, the various weight ratios of NiOx (1:5 and 3:2) are explored to optimize the study. NiOx nanoparticles avoid corrosion on the n-GaN surface, decrease the solar water-splitting reaction overpotential, and enhance the photocurrent density at a working electrode applied bias of 1 V in the two-electrode system. Finally, in the stability test, the hydrogen evolution rate of NiOx (3:2) is more effective than that of pristine n-GaN even after 5 h. These results indicate that NiOx nanoparticle-decorated n-GaN gains higher photostability and hydrogen production performance in PEC cells.

中文翻译：

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NiOx 纳米粒子作为活性水分解催化剂提高 n-GaN 光阳极的光稳定性

摘要 在本文中，我们提出了一种方案，在 n-GaN 光阳极上使用 p-NiOx 纳米颗粒的保形涂层来防止光电极腐蚀，从而提高转换效率。此外，探索了 NiOx 的各种重量比（1:5 和 3:2）以优化研究。NiOx 纳米粒子避免了 n-GaN 表面的腐蚀，降低了太阳能水分解反应的过电位，并提高了双电极系统中工作电极施加 1 V 偏压的光电流密度。最后，在稳定性测试中，即使在 5 小时后，NiOx (3:2) 的析氢率也比原始 n-GaN 的析氢率更有效。这些结果表明，NiOx 纳米颗粒装饰的 n-GaN 在 PEC 电池中获得了更高的光稳定性和产氢性能。