塔菲尔方程
析氧
化学
多孔性
电解
退火(玻璃)
电化学
化学工程
电解水
润湿
海水
电极
材料科学
复合材料
海洋学
地质学
工程类
电解质
物理化学
有机化学
作者
Yanwei Zhang,Zhangfu Yuan,Xiangtao Yu,Yuhui Hao,Linfei Zhao
标识
DOI:10.1016/j.jelechem.2021.115919
摘要
Efficient, low-cost and stable eletrocatalysts for oxygen evolution reaction (OER) is critical in commercial large-scale water electrolysis. Herein, a 3D self-supporting porous NiFe2O4-Ni3P-Fe2P film with sea urchin-like structure was fabricated by one-step electrodeposition, phase separation during the annealing, and selective oxidation thermal treatment. The multi-phase NiFe2O4-Ni3P-Fe2P film exhibited superior OER elerocatalytic activity and the long-term stability in alkaline solution. The overpotentials were 102 and 641 mV at current densities of 10 and 200 mA cm−2, respectively. The Tafel slope was 42 mV dec-1. The excellent performance could be attributed to the plentiful active sites provided porous sea urchin-like structure, the good conductivity of NiFe2O4, the synergetic effect of multiphase structure and the superior wettability. The features of NiFe2O4-Ni3P-Fe2P film display promising application potential in the field of electrochemistry.
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