纳米片
过电位
催化作用
普鲁士蓝
塔菲尔方程
氧化物
化学
氢氧化物
热液循环
析氧
化学工程
无机化学
蚀刻(微加工)
纳米技术
材料科学
电化学
图层(电子)
有机化学
电极
物理化学
工程类
作者
Rui Xiang,Yunchuan Nong,Kejin Song,Maoting Li,Xingyu Wang
标识
DOI:10.1002/ejic.202200111
摘要
Abstract Earth‐abundant metal oxides/hydroxides have recently been identified as promising catalysts for oxygen evolution reaction (OER) in alkaline media, while the overall efficiency is still limited by the sluggish kinetics. Therefore, searching for facile and effective method to prepare composition and morphology tunable catalyst, as well as understanding its reactivity are urgent tasks. Here, we report a hydrothermal etching strategy for the synthesis of Fe doped Co oxides/hydroxide hybrid catalyst with hierarchical nanosheet array architecture. The as‐obtained catalyst shows an overpotential of 219 mV without iR compensation at 10 mA/cm 2 and a low Tafel slope of 46.4 mV/dec, surpassing the other control catalysts in this work and most similar catalysts in literature. Comprehensive studies confirm that both composition and morphology can be rationally tuned by adjusting the hydrothermal etching parameters, and the improvement of activity is attributed to the highly active Fe doped Co oxides/hydroxide species together with the unique 3D hierarchical structure.
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