文献类型：期刊文献

英文题名：Intrinsic Electrocatalytic Activity of Gold Nanoparticles Measured by Single Entity Electrochemistry

作者：Peng, Yue-Yi[1];Guo, Dan[1];Ma, Wei[1];Long, Yi-Tao[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2018

卷号：5

期号：20

起止页码：2982

外文期刊名：CHEMELECTROCHEM

收录：;EI(收录号：20184105928644);WOS:【SCI-EXPANDED(收录号:WOS:000448518500007)】；

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

语种：英文

外文关键词：single nanoparticle; electrocatalytic activity; size dependent; collision; sulfide/polysulfide

摘要：Understanding the real nature of the intrinsic electrocatalytic performance of the counter electrode is crucial for realizing high conversion efficiency of solar energy in photoelectric devices. However, owing to the average effects, a thorough insight into such electrocatalytic process remains challenging in ensemble measurements. Here, we realized the real-time detection of electrocatalytic reduction of a single Au nanoparticle (NP) in sulfide/polysulfide redox electrolyte solution using single entity collision electrochemistry. Owing to the high-sensitivity electrochemical measurement, size-dependent electrocatalytic behaviors of polysulfide reduction were observed for single AuNP collision. Our approach allowed the electrocatalytic properties of AuNPs for polysulfide electrolyte reduction at the single NPs level to be quantified, and the turnover number as a function of particle size were further estimated. Our result has further pointed out the importance of NP size control in the electrocatalysis study.