钌
催化作用
兴奋剂
电解质
氢
吸附
表面工程
材料科学
分解水
化学工程
金属
应变工程
化学物理
无机化学
化学
纳米技术
物理化学
冶金
电极
硅
工程类
光催化
生物化学
有机化学
光电子学
作者
Jian Jiao,Nannan Zhang,Chao Zhang,Ning Sun,Yuan Pan,Chen Chen,Jun Li,Meijie Tan,Ruixue Cui,Zhaolin Shi,Jiangwei Zhang,Hai Xiao,Tong‐Bu Lu
标识
DOI:10.1002/advs.202200010
摘要
Abstract For heterogeneous catalysts, the active sites exposed on the surface have been investigated intensively, yet the effect of the subsurface‐underlying atoms is much less scrutinized. Here, a surface‐engineering strategy to dope Ru into the subsurface/surface of Co matrix is reported, which alters the electronic structure and lattice strain of the catalyst surface. Using hydrogen evolution (HER) as a model reaction, it is found that the subsurface doping Ru can optimize the hydrogen adsorption energy and improve the catalytic performance, with overpotentials of 28 and 45 mV at 10 mA cm −2 in alkaline and acidic media, respectively, and in particular, 28 mV in neutral electrolyte. The experimental results and theoretical calculations indicate that the subsurface/surface doping Ru improves the HER efficiency in terms of both thermodynamics and kinetics. The approach here stands as an effective strategy for catalyst design via subsurface engineering at the atomic level.
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