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Sub-3 nm Intermetallic Ordered Pt3In Clusters for Oxygen Reduction Reaction.

ABSTRACT: Industrial applications of Pt-based oxygen-reduction-reaction (ORR) catalysts are limited by high cost and low stability. Here, facile large-scale synthesis of sub-3-nm ordered Pt3In clusters on commercial carbon black as ORR catalyst that alleviates both these shortcomings is reported. As-prepared Pt3In/C exhibits a mass activity of 0.71 mA mg-1 and a specific area activity of 0.91 mA cm-2 at 0.9 V vs reversible hydrogen electrode, which are 4.1 and 2.7 times the corresponding values of commercial Pt/C catalysts. The as-prepared ordered Pt3In/C catalyst is also remarkably stable with negligible activity and structural decay after 20 000 accelerated electrochemical durability cycles, due to its ordered structure. Density-functional-theory calculations demonstrate that ordered-Pt3In is more energetically favorable for ORR than the commercial Pt/C catalysts because ?G O is closer to the peak of the volcano plot after ordered incorporation of indium atoms.

SUBMITTER: Wang Q 

PROVIDER: S-EPMC6974934 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature

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Sub-3 nm Intermetallic Ordered Pt<sub>3</sub>In Clusters for Oxygen Reduction Reaction.

Wang Qi Q   Zhao Zhi Liang ZL   Zhang Zhe Z   Feng Tianli T   Zhong Ruyi R   Xu Hu H   Pantelides Sokrates T ST   Gu Meng M  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20191118 2

Industrial applications of Pt-based oxygen-reduction-reaction (ORR) catalysts are limited by high cost and low stability. Here, facile large-scale synthesis of sub-3-nm ordered Pt<sub>3</sub>In clusters on commercial carbon black as ORR catalyst that alleviates both these shortcomings is reported. As-prepared Pt<sub>3</sub>In/C exhibits a mass activity of 0.71 mA mg<sup>-1</sup> and a specific area activity of 0.91 mA cm<sup>-2</sup> at 0.9 V vs reversible hydrogen electrode, which are 4.1 and 2  ...[more]

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