Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis

Lingzheng Bu, Shaojun Guo (), Xu Zhang, Xuan Shen, Dong Su, Gang Lu, Xing Zhu, Jianlin Yao, Jun Guo and Xiaoqing Huang ()
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Lingzheng Bu: College of Chemistry, Chemical Engineering and Materials Science, Soochow University
Shaojun Guo: College of Engineering, Peking University
Xu Zhang: California State University
Xuan Shen: Center for Functional Nanomaterials, Brookhaven National Laboratory
Dong Su: Center for Functional Nanomaterials, Brookhaven National Laboratory
Gang Lu: California State University
Xing Zhu: Testing and Analysis Center, Soochow University
Jianlin Yao: College of Chemistry, Chemical Engineering and Materials Science, Soochow University
Jun Guo: Testing and Analysis Center, Soochow University
Xiaoqing Huang: College of Chemistry, Chemical Engineering and Materials Science, Soochow University

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract Despite intense research in past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge in realizing fuel cell technologies for transportation applications. Here we report a facile strategy for synthesizing hierarchical platinum-cobalt nanowires with high-index, platinum-rich facets and ordered intermetallic structure. These structural features enable unprecedented performance for the oxygen reduction and alcohol oxidation reactions. The specific/mass activities of the platinum-cobalt nanowires for oxygen reduction reaction are 39.6/33.7 times higher than commercial Pt/C catalyst, respectively. Density functional theory simulations reveal that the active threefold hollow sites on the platinum-rich high-index facets provide an additional factor in enhancing oxygen reduction reaction activities. The nanowires are stable in the electrochemical conditions and also thermally stable. This work may represent a key step towards scalable production of high-performance platinum-based nanowires for applications in catalysis and energy conversion.

Date: 2016
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DOI: 10.1038/ncomms11850

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