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Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis.


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.

SUBMITTER: Bu L 

PROVIDER: S-EPMC4931244 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature

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Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis.

Bu Lingzheng L   Guo Shaojun S   Zhang Xu X   Shen Xuan X   Su Dong D   Lu Gang G   Zhu Xing X   Yao Jianlin J   Guo Jun J   Huang Xiaoqing X  

Nature communications 20160629


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 activit  ...[more]

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