Unraveling the modulation essence of p bands in Co-based oxide stability on acidic oxygen evolution reaction  

作　　者：Yafei Yang Yihao Xu Haiquan Liu Qi Zhang Boling Liu Menghua Yang Huan Dai Zunjian Ke Dong He Xiaobo Feng Xiangheng Xiao 

机构地区：[1]Department of Physics,Zhongnan Hospital of Wuhan University,Wuhan University,Wuhan 430072,China [2]School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China [3]Yunnan Key Laboratory of Opto-electronic Information Technology,Kunming 650500,China

出　　处：《Nano Research》2024年第7期5922-5929,共8页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.12025503,U23B2072,and 12105208)。

摘　　要：The oxygen evolution reaction(OER)electrocatalysts,which can keep active for a long time in acidic media,are of great significance to proton exchange membrane water electrolyzers.Here,Ru-Co_(3)O_(4)electrocatalysts with transition metal oxide Co_(3)O_(4)as matrix and the noble metal Ru as doping element have been prepared through an ion exchange–pyrolysis process mediated by metal-organic framework,in which Ru atoms occupy the octahedral sites of Co_(3)O_(4).Experimental and theoretical studies show that introduced Ru atoms have a passivation effect on lattice oxygen.The strong coupling between Ru and O causes a negative shift in the energy position of the O p-band centers.Therefore,the bonding activity of oxygen in the adsorbed state to the lattice oxygen is greatly passivated during the OER process,thus improving the stability of matrix material.In addition,benefiting from the modulating effect of the introduced Ru atoms on the metal active sites,the thermodynamic and kinetic barriers have been significantly reduced,which greatly enhances both the catalytic stability and reaction efficiency of Co_(3)O_(4).

关 键 词：p-band modulation oxygen evolution reaction STABILITY acidic oxygen evolution reaction(OER) 

分 类 号：O64[理学—物理化学]