title: Single-Molecule Nanocatalysis Shows In Situ Deactivation of Pt/C Electrocatalysts during the Hydrogen-Oxidation Reaction.
abstract: By coupling a Pt-catalyzed fluorogenic reaction with the Pt-electrocatalyzed hydrogen-oxidation reaction (HOR), we combine single-molecule fluorescence microscopy with traditional electrochemical methods to study the real-time deactivation kinetics of a Pt/C electrocatalyst at single-particle level during electrocatalytic hydrogen-oxidation reaction. The decay of the catalytic performance of Pt/C could be mainly attributed to the electrocatalysis-induced etching or dissolution of Pt nanoparticles. Spontaneous regeneration of activity and incubation period of the Pt electrocatalyst were also observed at single-particle level. All these new insights are practically useful for the understanding and rational design of highly efficient electrocatalysts for application in fuel cells.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China.|Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China.
authors.forename: Yuwei
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China.|Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China.|Graduate University of Chinese Academy of Science, Beijing, 100049, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.affiliation: National Renewable Energy Laboratory, Golden, CO, 80401, USA.
authors.forename: Shaun
authors.initials: S
authors.lastname: Alia
authors.affiliation: National Renewable Energy Laboratory, Golden, CO, 80401, USA.
authors.forename: Bryan S
authors.initials: BS
authors.lastname: Pivovar
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China. weilinxu@ciac.ac.cn.|Jilin Province Key Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun, 130022, P.R. China. weilinxu@ciac.ac.cn.
authors.forename: Weilin
authors.initials: W
authors.lastname: Xu
keywords: deactivation; electrocatalysis; electrochemistry; platinum; single-molecule fluorescence