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Research Article

Interfacial engineering of 3D hollow CoSe2@ultrathin MoSe2 core@shell heterostructure for efficient pH-universal hydrogen evolution reaction

Lili Zhang1Yuanting Lei1Danni Zhou2Chengli Xiong1Zhuoli Jiang3Xinyuan Li3Huishan Shang1( )Yafei Zhao1Wenxing Chen2( )Bing Zhang1
School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Department of Chemistry, Tsinghua University, Beijing 100084, China
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Graphical Abstract

The three-dimensional (3D) hollow CoSe2@MoSe2 core@shell heterostructure was employed as an effective pH-universal hydrogen evolution reaction (HER) electrocatalyst by interface engineering. The enhanced performance could be attributed to the maximized exposed edge active sites and the shortest electron/ion transmission path of the unique heterostructure.

Abstract

Rational design and construction of low-cost and highly efficient electrocatalysts for hydrogen evolution reaction (HER) is meaningful but challenging. Herein, a robust three dimensional (3D) hollow CoSe2@ultrathin MoSe2 core@shell heterostructure (CoSe2@MoSe2) is proposed as an efficient HER electrocatalyst through interfacial engineering. Benefitting from the abundant heterogeneous interfaces on CoSe2@MoSe2, the exposed edge active sites are maximized and the charge transfer at the hetero-interfaces is accelerated, thus facilitating the HER kinetics. It exhibits remarkable performance in pH-universal conditions. Notably, it only needs an overpotential (η10) of 108 mV to reach a current density of 10 mA·cm−2 in 1.0 M KOH, outperforming most of the reported transition metal selenides electrocatalysts. Density functional theory (DFT) calculations unveil that the heterointerfaces synergistically optimize the Gibbs free energies of H2O and H* during alkaline HER, accelerating the reaction kinetics. The present work may provide new construction guidance for rational design of high-efficient electrocatalysts.

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Pages 2895-2904
Cite this article:
Zhang L, Lei Y, Zhou D, et al. Interfacial engineering of 3D hollow CoSe2@ultrathin MoSe2 core@shell heterostructure for efficient pH-universal hydrogen evolution reaction. Nano Research, 2022, 15(4): 2895-2904. https://doi.org/10.1007/s12274-021-3887-9
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Received: 15 July 2021
Revised: 14 September 2021
Accepted: 15 September 2021
Published: 06 November 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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