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- Title
Single-Molecule Nanocatalysis Shows In Situ Deactivation of Pt/C Electrocatalysts during the Hydrogen-Oxidation Reaction.
- Authors
Zhang, Yuwei; Chen, Tao; Alia, Shaun; Pivovar, Bryan S.; Xu, Weilin
- 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.
- Subjects
FLUORESCENCE microscopy; ELECTROCATALYSTS; HYDROGEN oxidation; NANOELECTRONICS; NANOPARTICLES; ELECTROCHEMISTRY
- Publication
Angewandte Chemie, 2016, Vol 128, Issue 9, p3138
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201511071