原子单位
配体(生物化学)
还原(数学)
比例(比率)
氧还原反应
氧气
氧还原
纳米技术
化学
材料科学
物理化学
物理
电化学
数学
有机化学
受体
几何学
量子力学
生物化学
电极
作者
Shenghua Ye,Wenda Chen,Zhi‐Jun Ou,Qinghao Zhang,Jie Zhang,Yongliang Li,Xiangzhong Ren,Xiaoping Ouyang,Lirong Zheng,Xueqing Yan,Jianhong Liu,Qianling Zhang
标识
DOI:10.1002/ange.202414989
摘要
Defect engineering is an effective strategy for regulating the electrocatalysis of nanomaterials, yet it is seldom considered for modulating Pt‐based electrocatalysts for the oxygen reduction reaction (ORR). In this study, we designed Ni‐doped vacancy‐rich Pt nanoparticles anchored on nitrogen‐doped graphene (Vac‐NiPt NPs/NG) with a low Pt loading of 3.5 wt.% and a Ni/Pt ratio of 0.038:1. Physical characterizations confirmed the presence of abundant atomic‐scale vacancies in the Pt NPs induces long‐range lattice distortions, and the Ni dopant generates a ligand effect resulting in electronic transfer from Ni to Pt. Experimental results and theoretical calculations indicated that atomic‐scale vacancies mainly contributed the tolerance performances towards CO and CH3OH, the ligand effect derived from a tiny of Ni dopant accelerated the transformation from *O to *OH species, thereby improved the ORR activity without compromising the tolerance capabilities. Benefiting from the synergistic interplay between atomic‐scale vacancies and ligand effect, as‐prepared Vac‐NiPt NPs/NG exhibited improved ORR activity, sufficient tolerance capabilities, and excellent durability. This study offers a new avenue for modulating the electrocatalytic activity of metal‐based nanomaterials.
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