Origin of High Activity and Durability of Twisty Nanowire Alloy Catalysts under Oxygen Reduction and Fuel Cell Operating Conditions

The ability to control the surface composition and morphology of alloy catalysts is critical for achieving high activity and durability of catalysts for oxygen reduction reaction (ORR) and fuel cells. This report describes an efficient surfactant-free synthesis route for producing a twisty nanowire...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2020-01, Vol.142 (3), p.1287-1299
Main Authors: Kong, Zhijie, Maswadeh, Yazan, Vargas, Jorge A, Shan, Shiyao, Wu, Zhi-Peng, Kareem, Haval, Leff, Asher C, Tran, Dat T, Chang, Fangfang, Yan, Shan, Nam, Sanghyun, Zhao, Xingfang, Lee, Jason M, Luo, Jin, Shastri, Sarvjit, Yu, Gang, Petkov, Valeri, Zhong, Chuan-Jian
Format: Article
Language:English
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Summary:The ability to control the surface composition and morphology of alloy catalysts is critical for achieving high activity and durability of catalysts for oxygen reduction reaction (ORR) and fuel cells. This report describes an efficient surfactant-free synthesis route for producing a twisty nanowire (TNW) shaped platinum–iron (PtFe) alloy catalyst (denoted as PtFe TNWs) with controllable bimetallic compositions. PtFe TNWs with an optimal initial composition of ∼24% Pt are shown to exhibit the highest mass activity (3.4 A/mgPt, ∼20 times higher than that of commercial Pt catalyst) and the highest durability (
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.9b10239