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Unveiling the Size Effect of Pt-on-Au Nanostructures Towards CO and Methanol Electrooxidation by In-Situ Electrochemical SERS

Abstract

In-situ monitoring of electrocatalytic processes at solid-liquid interfaces is essential for the fundamental understanding of reaction mechanisms, yet quite challenging. Herein, Pt-on-Au nanocatalysts with a Au-core Pt-satellite superstructure have been fabricated. In such Pt-on-Au nanocatalysts, the Au cores can greatly amplify the Raman signals of species adsorbed on Pt, allowing the in-situ surface-enhanced Raman spectroscopy (SERS) study of the electrocatalytic reactions on Pt. Combined electrochemical method and in-situ SERS, size effects of Pt on the catalytic performance of the core-satellite nanocomposites towards CO and methanol electrooxidation are revealed. It is found that such Pt-on-Au nanocomposites show improved activity and long-term stability for the electrooxidation of CO and methanol with the decrease of the Pt size. This work demonstrates an effective strategy to achieve the in-situ monitoring of electrocatalytic processes and to boost the catalytic performance towards electrooxidation simultaneously.

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Supplementary files

Article information


Submitted
05 Dec 2019
Accepted
03 Feb 2020
First published
04 Feb 2020

Nanoscale, 2020, Accepted Manuscript
Article type
Communication

Unveiling the Size Effect of Pt-on-Au Nanostructures Towards CO and Methanol Electrooxidation by In-Situ Electrochemical SERS

X. Chen, M. Liang, J. Xu, H. Sun, C. Wang, J. Wei, H. Zhang, W. Yang, Z. Yang, J. Sun, Z. Tian and J. Li, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/C9NR10304J

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