钌
催化作用
兴奋剂
氢
材料科学
基质(化学分析)
化学工程
金属
无机化学
化学
复合材料
冶金
光电子学
工程类
有机化学
作者
Jiqing 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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