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

Journal Article · · Journal of Materials Chemistry. A
DOI: https://doi.org/10.1039/c9ta12456j · OSTI ID:1802680
ORCiD logo [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3]; ORCiD logo [3]; ORCiD logo [3];  [4];  [4];  [5]; ORCiD logo [6]; ORCiD logo [4]
  1. The Univ. of Electro-Communications, Chofu (Japan). Innovation Research Center for Fuel Cells; OSTI
  2. The Univ. of Electro-Communications, Chofu (Japan). Innovation Research Center for Fuel Cells
  3. Chinese Academy of Sciences (CAS), Changchun (China). State Key Lab. of Electroanalytical Chemistry. Changchun Inst. of Applied Chemistry
  4. Univ. of Waterloo, ON (Canada). Dept. of Chemical Engineering
  5. Japan Synchrotron Radiation Research Inst., Sayo (Japan). SPring-8
  6. Univ. of Kansas, Lawrence, KS (United States). Dept. of Chemical and Petroleum Engineering

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.

Research Organization:
Univ. of Kansas, Lawrence, KS (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0014561
OSTI ID:
1802680
Journal Information:
Journal of Materials Chemistry. A, Journal Name: Journal of Materials Chemistry. A Journal Issue: 3 Vol. 8; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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