NiFe Hydroxide Lattice Tensile Strain: Enhancement of Adsorption of Oxygenated Intermediates for Efficient Water Oxidation Catalysis

作者：Daojin Zhou, Shiyuan Wang, Yin Jia, Xuya Xiong, Hongbin Yang, Song Liu, Jialun Tang, Junming Zhang, Dong Liu, Lirong Zheng, Yun Kuang, Xiaoming Sun, Bin Liu · 发表于：Angewandte Chemie International Edition · 年份：2018 · DOI：10.1002/anie.201809689 · 被引用次数：523 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Supercapacitor Materials and Fabrication

Abstract The binding strength of reactive intermediates with catalytically active sites plays a crucial role in governing catalytic performance of electrocatalysts. NiFe hydroxide offers efficient oxygen evolution reaction (OER) catalysis in alkaline electrolyte, however weak binding of oxygenated intermediates on NiFe hydroxide still badly limits its catalytic activity. Now, a facile ball‐milling method was developed to enhance binding strength of NiFe hydroxide to oxygenated intermediates via generating tensile strain, which reduced the anti‐bonding filling states in the d orbital and thus facilitated oxygenated intermediates adsorption. The NiFe hydroxide with tensile strain increasing after ball‐milling exhibits an OER onset potential as low as 1.44 V (vs. reversible hydrogen electrode) and requires only a 270 mV overpotential to reach a water oxidation current density of 10 mA cm −2 .