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Construction of Co/MoSe2 Mott-Schottky heterojunction on car-bon nanotubes for highly efficient hydrogen evolution
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  • Xianpei Ren,
  • Qiwei Hu,
  • Fang Ling,
  • Fei Wu,
  • Qiang Li,
  • Liuqing Pang
Xianpei Ren
Sichuan University of Science and Engineering

Corresponding Author:[email protected]

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Qiwei Hu
Sichuan University of Science and Engineering
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Fang Ling
Sichuan University of Science and Engineering
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Fei Wu
Sichuan University of Science and Engineering
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Qiang Li
Sichuan University of Science and Engineering
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Liuqing Pang
The First Monitoring and Application Center, CEA
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Abstract

In this work, we report a typical Mott-Schottky electrocatalyst composed of metallic Co and semiconducting MoSe2 on carbon nanotubes (Co/MoSe2@CNT), prepared by sol-gel process followed by thermal reduction treatment. The characterization results and theoretical calculations reveal that Co/MoSe2 Mott-Schottky heterojunction can cause electron redistribution and establish an build-in electric field, which can not only optimize the adsorption energy of the reaction intermediates, but also promote the charge transfer during the hydrogen evolution process. Thus, Co/MoSe2@CNT deliver excellent catalytic activity with a low overpotential of 185 mV at 10 mA cm-2 and a small Tafel slope of 69 mV dec-1. This work provides a new strategy for constructing Co/MoSe2 Mott-Schottky heterojunc-tions and highlighting the Mott-Schottky effect, which may inspire the development of more efficient Mott Schottky electrocatalysts for H2 production in the future.