A highly active and stable hydrogen evolution catalyst based on pyrite-structured cobalt phosphosulfide

Wen Liu, Enyuan Hu, Hong Jiang, Yingjie Xiang, Zhe Weng, Min Li, Qi Fan, Xiqian Yu, Eric I. Altman and Hailiang Wang ()
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Wen Liu: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Enyuan Hu: Brookhaven National Laboratory
Hong Jiang: Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University
Yingjie Xiang: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Zhe Weng: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Min Li: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Qi Fan: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Xiqian Yu: Brookhaven National Laboratory
Eric I. Altman: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA
Hailiang Wang: Yale University, 520 West Campus Drive, West Haven, Connecticut 06511, USA

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Rational design and controlled synthesis of hybrid structures comprising multiple components with distinctive functionalities are an intriguing and challenging approach to materials development for important energy applications like electrocatalytic hydrogen production, where there is a great need for cost effective, active and durable catalyst materials to replace the precious platinum. Here we report a structure design and sequential synthesis of a highly active and stable hydrogen evolution electrocatalyst material based on pyrite-structured cobalt phosphosulfide nanoparticles grown on carbon nanotubes. The three synthetic steps in turn render electrical conductivity, catalytic activity and stability to the material. The hybrid material exhibits superior activity for hydrogen evolution, achieving current densities of 10 mA cm−2 and 100 mA cm−2 at overpotentials of 48 mV and 109 mV, respectively. Phosphorus substitution is crucial for the chemical stability and catalytic durability of the material, the molecular origins of which are uncovered by X-ray absorption spectroscopy and computational simulation.

Date: 2016
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DOI: 10.1038/ncomms10771

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