文献类型：期刊文献

英文题名：Correlated Anodic-Cathodic Nanocollision Events Reveal Redox Behaviors of Single Silver Nanoparticles

作者：Hafez, Mahmoud Elsayed[1,2,3];Ma, Hui[1,2];Peng, Yue-Yi[1,2];Ma, Wei[1,2];Long, Yi-Tao[1,2,4]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Beni Suef Univ, Dept Chem, Fac Sci, Bani Suwayf 62511, Egypt;[4]Nanjing Univ, State Key Lab Analyt Chem Life Sci, Sch Chem & Chem Engn, Nanjing 210023, Jiangsu, Peoples R China

年份：2019

卷号：10

期号：12

起止页码：3276

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：;EI(收录号：20192607094547);WOS:【SCI-EXPANDED(收录号:WOS:000472804700013)】；

基金：This research was supported by the National Natural Science Foundation of China (21775043, 21421004, and 21327807), the Program of Introducing Talents of Discipline to Universities (B16017), the Shanghai Municipal Natural Science Fund (19ZR1472100), 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：Electron transport properties - Metal nanoparticles - Microelectrodes - Anodic oxidation - Silver oxides - Electrooxidation - Electrochemical oxidation - Electrolytic reduction - Redox reactions

摘要：We reported a novel method to real-time monitor the redox behaviors of single Ag nanoparticles (AgNPs) at a Au ultramicroelectrode between oxidizing and reducing pulse potentials using the nanocollision electrochemical method. At fast pulse potentials, the instantaneous anodic-cathodic current transients of a single AgNP were observed for the electrooxidation of AgNP, followed by the electroreduction of the newborn silver oxide (AgO) NP in alkaline media via switching of redox potentials; however, only anodic oxidation signals of individual AgNPs were observed in neutral solution. Through this study, we have revealed the substantial different dynamic nanocollision electrochemical behaviors of single AgNPs on the electrode surface in various media. Our study offers a new view for clearly clarifying in situ tracking of the electron-transfer process of single NPs by correlating electrochemical oxidation and reduction behaviors with the complementary information.