Abstract

Developing highly efficient, low-cost, and stable electrocatalyst for the oxygen evolution reaction (OER) is essential for hydrogen production by electrolyzing water. In this paper, ZnO/amorphous-FeOOH core-shell nanorod array is fabricated on Ni foil via a simple two-step chemical bath method and used as OER catalyst. Amorphous FeOOH possesses more O defects than crystalline FeOOH. Besides, the X-ray photoelectron spectroscopy (XPS) results reveal that the strong electron interactions on nano-interface between ZnO and FeOOH facilitate charge transfer from FeOOH to ZnO. Due to these advantages, the ZnO/amorphous-FeOOH hybrid nanorods exhibit excellent electrocatalytic performance for OER, with an overpotential of 301 mV at 10 mA cm⁻², Tafel slope of 50 mV dec⁻¹, and outstanding stability.

中文翻译：

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与ZnO纳米棒阵列耦合促进无定形FeOOH对氧释放反应的电催化活性

摘要

开发用于氧气析出反应（OER）的高效，低成本和稳定的电催化剂对于通过电解水制氢至关重要。本文通过简单的两步化学浴法，在镍箔上制备了ZnO /非晶态FeOOH核壳纳米棒阵列，并用作OER催化剂。非晶态FeOOH比晶态FeOOH具有更多的O缺陷。此外，X射线光电子能谱（XPS）的结果表明，ZnO和FeOOH之间的纳米界面上的强电子相互作用促进了FeOOH向ZnO的电荷转移。由于这些优点，ZnO /非晶态-FeOOH杂化纳米棒对OER表现出优异的电催化性能，在10 mA cm ^-2时的超电势为301 mV ，Tafel斜率为dec ^-1的50 mV，并具有出色的稳定性。