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Issue 3, 2020
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Evidence for interfacial geometric interactions at metal–support interfaces and their influence on the electroactivity and stability of Pt nanoparticles

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Abstract

Supported metals are widely used as industrial catalysts wherein the supports affect catalytic performances remarkably through either electronic and/or geometric interactions with the metals, and/or providing interfacial synergistic sites. Herein, we observed evidence for interfacial geometric interactions (IGIs) at Pt–C interfaces through a combination of atomic-scale structural analysis, in situ X-ray absorption fine structure, and electrochemical measurements for Pt/C model systems. The IGI has a long-range attribute and affects Pt surface atoms not only at interfacial perimeters but also adjacent to interfaces. The affected Pt surface atoms are proposed to contribute enhanced activity and stability for the oxygen reduction reaction through retarding the formation of strongly adsorbed oxygenated intermediates. Our work provides some necessary information for a better understanding of support effects and catalytically active surface sites.

Graphical abstract: Evidence for interfacial geometric interactions at metal–support interfaces and their influence on the electroactivity and stability of Pt nanoparticles

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Article information


Submitted
12 Nov 2019
Accepted
15 Dec 2019
First published
17 Dec 2019

J. Mater. Chem. A, 2020,8, 1368-1377
Article type
Paper

Evidence for interfacial geometric interactions at metal–support interfaces and their influence on the electroactivity and stability of Pt nanoparticles

X. Zhao, T. Gunji, T. Kaneko, S. Takao, T. Sakata, K. Higashi, Y. Yoshida, J. Ge, C. Liu, W. Xing, J. Zhu, M. Xiao, T. Uruga, F. (. Tao and Z. Chen, J. Mater. Chem. A, 2020, 8, 1368
DOI: 10.1039/C9TA12456J

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