nanowires for efficient electrocatalysis
Lingzheng Bu1, Shaojun Guo*,2,3, Xu Zhang4, Xuan Shen5, Dong Su5, Gang Lu4, Xing Zhu6, Jianlin Yao1, Jun Guo6& Xiaoqing Huang*,1（黄小青）
1 College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu 215123, China.
2 Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.
3 Department of Energy and Resources Engineering, College of Engineering Peking University, Beijing 100871, China.
4 Department of Physics and Astronomy, California State University, Northridge 91330, California, USA.
5 Center Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA.
6 Testing and Analysis Center, Soochow University, Jiangsu 215123,China.
NATURE COMMUNICATIONS 7,11850(2016)
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 highperformance platinum-based nanowires for applications in catalysis and energy conversion.
链接：http://www.nature.com/articles/ncomms11850#abstract