文献类型：期刊文献

英文题名：Single Ag Nanoparticle Electro-oxidation: Potential-Dependent Current Traces and Potential-Independent Electron Transfer Kinetic

作者：Ma, Wei;Ma, Hui;Yang, Zhe-Yao;Long, Yi-Tao[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2018

卷号：9

期号：6

起止页码：1429

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：;EI(收录号：20181204920398);WOS:【SCI-EXPANDED(收录号:WOS:000427910200040)】；

基金：This research was supported by the National Natural Science Foundation of China (21421004, 21775043, and 21327807), the 973 Program (2014CB748500), the Program of Introducing Talents of Discipline to Universities (B16017), the Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02-E00023), and the Fundamental Research Funds for the Central Universities (222201718001, 222201717003).

语种：英文

外文关键词：Boltzmann equation - Electrooxidation - Kinetics - Electron transitions - Poisson equation - Silver nanoparticles

摘要：Potential-dependent current traces were first observed for the same sized nanoparticles (NPs) during the dynamic electro-oxidation process of single AgNPs. In this work, we demonstrated that the motion trajectories of NPs, coupled with electrochemical kinetics parameters, qualitatively predicted from the series of the experimentally observed current traces obtained single AgNPs collision behaviors. Based on the Poisson Boltzmann equation for a general electrochemical reaction, a rate constant of Ag oxidation could be further estimated to be 1 x 10(-6) mol.cm(-2).s(-1) for electron transfer between AgNPs and the Au electrode by comparing the experimental results. Our method provided a meaningful attempt to test electron transfer kinetics and motion behaviors of single NPs using the high-resolution electrochemical signal.