文献类型：期刊文献

英文题名：Enhanced Oxygen Reduction Reaction Performance by Adsorbed Water on Edge Sites

作者：Yu, Shengwei[1];Chen, Liyuan[1];Cheng, Na[1];Lu, Jiyuan[1];Bi, Liyuan[1];Zhang, Wenhui[1];Chen, Aiping;Jiang, Haibo[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Minist Educ, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Shanghai Engn Res Ctr Hierar, Shanghai 200237, Peoples R China

年份：2023

卷号：15

期号：17

起止页码：21049

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20231914061273);WOS:【SCI-EXPANDED(收录号:WOS:000979798800001)】；

基金：This work was supported by the National Natural Science Foundation of China (21838003 and 91834301) , the Shanghai Scientific and Technological Innovation Project (18JC1410600 and 19JC1410400) , the Social Development Program of Shanghai (17DZ1200900) , the Innovation Program of Shanghai Municipal Education Commission, and the Funda-mental Research Funds for the Central Universities (222201718002) .

语种：英文

外文关键词：platinum-based alloys; oxygen reduction reaction; adsorbed water; step site; electron interaction

摘要：Pt-based alloy nanoparticles have broad application prospects as cathode catalyst materials for proton-exchange membrane fuel cells (PEMFCs). Optimization of the oxygen adsorption energy is crucial to boost the performance of oxygen reduction catalysis. We successfully synthesized well-dispersed Pt1.2Ni tetrahedra and obtained the Pt1.2Ni/C catalyst adopting the one-pot synthetic protocol, which exhibits superb activity and good long-term stability for oxygen reduction reaction (ORR), achieving a mass activity of 1.53 A/mgPt at 0.90 VRHE, which is 12 times higher than that of commercial Pt/C. On combining X-ray photoelectron spectroscopy and density functional theory calculations, abundant water is adsorbed stably on the Pt1.2Ni alloy surface. We find that the intense interaction between the adsorbed O atom and adsorbed water can weaken the adsorption of oxygen, contributing to the ORR performance.