Photoelectrochemical water splitting is a promising green method for obtaining clean energy, and its core lies in the preparation of high-performance photoanodes. In this study, TiO nanorods/nanoflower homojunction photoanodes were prepared using a one-step hydrothermal method, unlike the complex material composite process used in most previous research works, the TiO homojunction photoanode obtained through a one-step method combines the advantages of nanorod and nanoflower structures. CoNiS was further used as an oxygen evolution cocatalyst supported on the TiO nanorods/nanoflower homojunction photoanodes, enhancing oxygen evolution kinetics. The photogenerated current density of the obtained TiO flower-rod/CoNiS composite photoanode at 1.23 V (versus RHE) was 1.64 mA cm, which is 2.3 times of that of TiO nanorod photoanode. By density function theory calculation, it is confirmed that the loading of CoNiS cocatalyst can significantly reduce the overpotential and enhance the kinetic process of oxygen evolution reaction.

中文翻译：

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CoNi2S4助催化剂修饰的TiO2纳米棒/纳米花同质结用于高效光电化学水分解

光电化学水分解是一种很有前景的获取清洁能源的绿色方法，其核心在于高性能光阳极的制备。本研究采用一步水热法制备了TiO纳米棒/纳米花同质结光阳极，与以往大多数研究工作中采用的复杂材料复合工艺不同，通过一步法获得的TiO同质结光阳极结合了纳米棒和纳米花同质结光阳极的优点。纳米花结构。 CoNiS 进一步用作 TiO 纳米棒/纳米花同质结光阳极上的析氧助催化剂，增强析氧动力学。所获得的TiO花棒/CoNiS复合光阳极在1.23 V（相对于RHE）下的光生电流密度为1.64 mA cm，是TiO纳米棒光阳极的2.3倍。通过密度函数理论计算，证实CoNiS助催化剂的负载可以显着降低过电势，增强析氧反应的动力学过程。