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Ternary CoPtAu Nanoparticles as a General Catalyst for Highly Efficient Electro‐oxidation of Liquid Fuels
Author(s) -
Li Junrui,
Jilani Safia Z.,
Lin Honghong,
Liu Xiaoming,
Wei Kecheng,
Jia Yukai,
Zhang Peng,
Chi Miaofang,
Tong YuYe J.,
Xi Zheng,
Sun Shouheng
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201906137
Subject(s) - catalysis , formic acid , methanol , ternary operation , nanoparticle , intermetallic , chemistry , inorganic chemistry , chemical engineering , infrared spectroscopy , ethanol , alloy , materials science , nuclear chemistry , organic chemistry , nanotechnology , computer science , engineering , programming language
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.
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