析氧
材料科学
催化作用
无定形固体
电解质
无机化学
硼化物
氢氧化物
硼
化学工程
过电位
分解水
塔菲尔方程
电化学
冶金
化学
物理化学
电极
结晶学
有机化学
工程类
光催化
生物化学
作者
Lincai Wang,Jiaxuan Li,Xiangsen Zhao,Weiju Hao,Xiaohua Ma,Shengji Li,Y. P. Guo
标识
DOI:10.1002/admi.201801690
摘要
Abstract The development of efficient and earth‐abundant water‐splitting electrocatalysts is of great importance for energy conversion and storage technologies. In this study, surface‐activated amorphous Fe x B catalysts, Fe–B–O@Fe 2 B and Fe–B–O@FeB 2 , are synthesized and remarkable activity for the oxygen evolution reaction (OER) is achieved, e.g., Fe–B–O@FeB 2 delivering a current density of 10 mA cm −2 at overpotential of 260 mV with Tafel slope of 57.9 mV dec −1 for OER in alkaline electrolyte. Iron oxide/hydroxide and oxidized borate species on the surface of Fe x B are found to have a synergistic effect on promoting the OER activity of the sample. Moreover, it is found that the OER active oxidization layer of iron boride is less active toward hydrogen evolution reaction.
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