MoS2 on topological insulator Bi2Te3 thin films: Activation of the basal plane 
for hydrogen reduction

Li, Guowei; Huang, Jue; Yang, Qun; Zhang, Liguo; Mu, Qingge; Sun, Yan; Parkin, Stuart; Chang, Kai; Felser, Claudia

doi:10.1016/j.jechem.2021.04.010

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MoS₂ on topological insulator Bi₂Te₃ thin films: Activation of the basal plane for hydrogen reduction

MPG-Autoren

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Huang, Jue
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;
International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Parkin, Stuart
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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https://doi.org/10.1016/j.jechem.2021.04.010
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Zitation

Li, G., Huang, J., Yang, Q., Zhang, L., Mu, Q., Sun, Y., et al. (2021). MoS₂ on topological insulator Bi₂Te₃ thin films: Activation of the basal plane for hydrogen reduction. Journal of Energy Chemistry, 62, 516-522. doi:10.1016/j.jechem.2021.04.010.

Zitierlink: https://hdl.handle.net/21.11116/0000-0008-9613-9

Zusammenfassung

2H-MoS₂ is a well-studied and promising non-noble metal electrocatalyst for heterogeneous reactions, such as the hydrogen evolution reaction (HER). The performance is largely limited by the chemically inert basal plane, which is unfavorable for surface adsorption and reactions. Herein, we report a facile method to boost the HER activities of 2H-MoS₂ by coupling with epitaxial Bi₂Te₃ topological insulator films. The as-obtained MoS₂/ Bi₂Te₃/SrTiO₃ catalyst exhibits prominent HER catalytic activities compared to that of pure MoS₂ structures, with a 189 mV decrease in the overpotential required to reach a current density of 10 mA cm^-2 and a low Tafel slope of 58 mV dec^-1. Theoretical investigations suggest that the enhanced catalytic activity originates from the charge redistribution at the interface between the Bi₂Te₃topological insulator films and the MoS₂ layer. The delocalized sp-derived topological surface states could denote electrons to the MoS₂ layer and activate the basal plane for hydrogen adsorption. This study demonstrates the potential of manipulating topological surface states to design high-performance electrocatalysts.