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Title: Ternary CoPtAu Nanoparticles as a General Catalyst for Highly Efficient Electro‐oxidation of Liquid Fuels

Journal Article · · Angewandte Chemie (International Edition)
ORCiD logo [1];  [2];  [1];  [3];  [1];  [4];  [4];  [3];  [2]; ORCiD logo [1]; ORCiD logo [1]
  1. Department of Chemistry Brown University Providence RI 02912 USA
  2. Department of Chemistry Georgetown University 37th and O Streets, NW Washington DC 20057 USA
  3. Center for Nanophase Materials Sciences Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
  4. Department of Chemistry Dalhousie University Halifax Nova Scotia B3H 4R2 Canada

Abstract Efficient electro‐oxidation of formic acid, methanol, and ethanol is challenging owing to the multiple chemical reaction steps required to accomplish full oxidation to CO 2 . Herein, a ternary CoPtAu nanoparticle catalyst system is reported in which Co and Pt form an intermetallic L1 0 ‐structure and Au segregates on the surface to alloy with Pt. The L1 0 ‐structure stabilizes Co and significantly enhances the catalysis of the PtAu surface towards electro‐oxidation of ethanol, methanol, and formic acid, with mass activities of 1.55 A/mg Pt , 1.49 A/mg Pt , and 11.97 A/mg Pt , respectively in 0.1  m HClO 4 . The L1 0 ‐CoPtAu catalyst is also stable, with negligible degradation in mass activities and no obvious Co/Pt/Au composition changes after 10 000 potential cycles. The in situ surface‐enhanced infrared absorption spectroscopy study indicates that the ternary catalyst activates the C−C bond more efficiently for ethanol oxidation.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1547604
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Vol. 58 Journal Issue: 33; ISSN 1433-7851
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 73 works
Citation information provided by
Web of Science

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