Tuning the Cobalt–Platinum Alloy Regulating Single-Atom Platinum for Highly Efficient Hydrogen Evolution Reaction

Weiwei Yang; Ping Cheng; Zhao LiYunxiang LinMengyuan LiJiangzhi ZiHuihui ShiGuisheng LiZichao LianHexing Li

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Tuning the Cobalt–Platinum Alloy Regulating Single-Atom Platinum for Highly Efficient Hydrogen Evolution Reaction

机译：Tuning the Cobalt–Platinum Alloy Regulating Single-Atom Platinum for Highly Efficient Hydrogen Evolution Reaction

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Designing atomically dispersed metal catalysts for the electrocatalytic hydrogen evolution reaction (HER) is a promising strategy to efficiently convert electrical energy to chemical fuels. This strategy, however, still faces the challenge of finding a catalyst with high activity and long-term durability. Here, single-atom platinum and cobalt–platinum-alloy nanocrystals in a nitrogen-doped porous-carbon framework (CoPt-Pt_(SA)/NDPCF) is confined. The electrocatalyst exhibits ultralow overpotentials under both alkaline and acidic conditions at a high current density of ?300 mA cm~(?2) and excellent long-term durability up to 100 h or 10 000 cycles, which are attributed to the synergetic effects of Pt_(SA) and tuning of the CoPt alloy in the NDPCF. Firstprinciples calculations suggested that Pt_(SA) aided by the CoPt alloy has high d-band occupation for promoting the reaction kinetics. This study opens a new avenue for designing heterostructures with the synergic effects of single metal atoms and metal alloys with outstanding performance in the HER.

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来源
《Advanced functional materials》 |2022年第39期|2205920.1-2205920.8|共8页
作者
Weiwei Yang; Ping Cheng; Zhao LiYunxiang LinMengyuan LiJiangzhi ZiHuihui ShiGuisheng LiZichao LianHexing Li;
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作者单位

School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093, P. R. China;

Institutes of Physical Science and Information Technology Anhui University Hefei, Anhui 230601, P. R. China;

The Education Ministry Key Lab of Resource Chemistry Joint International Research Laboratory of Resource Chemistry of Ministry of Education Shanghai Key Laboratory of Rare Earth Functional Materials and Shanghai Frontiers Science Center of Biomimetic Cata;

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正文语种英语
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alloys; electrochemical catalyses; hydrogen evolution reactions; MOFs; single atoms;

Tuning the Cobalt–Platinum Alloy Regulating Single-Atom Platinum for Highly Efficient Hydrogen Evolution Reaction

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