过电位
催化作用
氢氧化物
钌
析氧
分解水
镍
层状双氢氧化物
电解质
材料科学
吸附
无机化学
化学工程
化学
物理化学
电化学
电极
工程类
光催化
冶金
生物化学
作者
Panlong Zhai,Mingyue Xia,Yunzhen Wu,Guanghui Zhang,Junfeng Gao,Bo Zhang,Shuyan Cao,Yanting Zhang,Zhuwei Li,Zhixing Fan,Chen Wang,Xiaomeng Zhang,Jeffrey T. Miller,Licheng Sun,Jungang Hou
标识
DOI:10.1038/s41467-021-24828-9
摘要
Abstract Rational design of single atom catalyst is critical for efficient sustainable energy conversion. However, the atomic-level control of active sites is essential for electrocatalytic materials in alkaline electrolyte. Moreover, well-defined surface structures lead to in-depth understanding of catalytic mechanisms. Herein, we report a single-atomic-site ruthenium stabilized on defective nickel-iron layered double hydroxide nanosheets (Ru 1 /D-NiFe LDH). Under precise regulation of local coordination environments of catalytically active sites and the existence of the defects, Ru 1 /D-NiFe LDH delivers an ultralow overpotential of 18 mV at 10 mA cm −2 for hydrogen evolution reaction, surpassing the commercial Pt/C catalyst. Density functional theory calculations reveal that Ru 1 /D-NiFe LDH optimizes the adsorption energies of intermediates for hydrogen evolution reaction and promotes the O–O coupling at a Ru–O active site for oxygen evolution reaction. The Ru 1 /D-NiFe LDH as an ideal model reveals superior water splitting performance with potential for the development of promising water-alkali electrocatalysts.
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