电催化剂
化学发光
杰纳斯
纳米颗粒
催化作用
发光体
氧化还原
双金属片
纳米技术
杰纳斯粒子
光化学
铂金
化学
化学工程
材料科学
无机化学
电化学
电极
发光
物理化学
有机化学
工程类
光电子学
作者
Mengjiao Zhu,Jianbin Pan,Zeng‐Qiang Wu,Xiaoyu Gao,Wei Zhao,Xing‐Hua Xia,Jing‐Juan Xu,Hong‐Yuan Chen
标识
DOI:10.1002/ange.201800706
摘要
Abstract Noble metal nanoparticles are promising catalysts in electrochemical reactions, while understanding the relationship between the structure and reactivity of the particles is important to achieve higher efficiency of electrocatalysis, and promote the development of single‐molecule electrochemistry. Electrogenerated chemiluminescence (ECL) was employed to image the catalytic oxidation of luminophore at single Au, Pt, and Au‐Pt Janus nanoparticles. Compared to the monometal nanoparticles, the Janus particle structure exhibited enhanced ECL intensity and stability, indicating better catalytic efficiency. On the basis of the experimental results and digital simulation, it was concluded that a concentration difference arose at the asymmetric bimetallic interface according to different heterogeneous electron‐transfer rate constants at Au and Pt. The fluid slip around the Janus particle enhanced local redox reactions and protected the particle surface from passivation.
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