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.
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