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Research Article

Engineering defects and adjusting electronic structure on S doped MoO2 nanosheets toward highly active hydrogen evolution reaction

Shuo Geng1,2, Yequn Liu3, Yong Sheng Yu1,2( ), Weiwei Yang2( ), Haibo Li1
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, China
MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
Analytical Instrumentation Center, State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
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Graphical Abstract

Abstract

The electrocatalytic hydrogen evolution reaction (HER) is one of the most promising ways for low-cost hydrogen production in the future. In this work, hetero S atoms were introduced into the MoO2 to enhance the catalytic activity by simultaneously adjusting electron structure, engineering lattice defect, and increasing oxygen vacancies. And the S doped MoO2 nanosheets with proper S doping amount show the enhanced performance for HER. The optimized catalyst shows a small onset overpotential as low as 120 mV, a low overpotential of 176 mV at the current density of 10 mA/cm2 which is decreased 166 mV compared to that of the pristine MoO2 nanosheets, a low Tafel slope of 57 mV/decade, and a high turnover frequency of 0.13 H2/s per active site at 150 mV. This finding proposes an effective strategy to prepare nonprecious metal oxide catalyst for enhancing HER performance by rationally doping hetero atoms.

Keywords

S dopingMoO2defectelectron structurecharge transfer

Electronic Supplementary Material

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Nano Research
Volume 13 Issue 1,
January 2020
Pages 121-126
DOI: 10.1007/s12274-019-2582-6
Cite this article:
Geng S, Liu Y, Yu YS, et al. Engineering defects and adjusting electronic structure on S doped MoO2 nanosheets toward highly active hydrogen evolution reaction. Nano Research, 2020, 13(1): 121-126. https://doi.org/10.1007/s12274-019-2582-6
Topics:
DefectsElectrocatalysis Electronic structureHydrogen productionMetalsMolybdenum oxideNanosheets

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Received: 19 September 2019
Revised: 25 November 2019
Accepted: 26 November 2019
Published: 05 December 2019
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019
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