High-Content Metallic 1T Phase in MoS2-Based Electrocatalyst for Efficient Hydrogen Evolution

Liang Cai; Weiren Cheng; Tao Yao; Yuanyuan Huang; Fumin Tang; Qinghua Liu; Wei Liu; Zhihu Sun; Fengchun Hu; Yong Jiang; Wensheng Yan; Shiqiang Wei

doi:10.1021/acs.jpcc.7b03103

High-Content Metallic 1T Phase in MoS₂-Based Electrocatalyst for Efficient Hydrogen Evolution

Liang Cai, Weiren Cheng, Tao Yao, Yuanyuan Huang, Fumin Tang, Qinghua Liu^*, Wei Liu, Zhihu Sun, Fengchun Hu, Yong Jiang, Wensheng Yan, Shiqiang Wei

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

85 Scopus citations

Abstract

Realizing high-efficiency hydrogen evolution in cost-effective and long-lasting electrocatalysts is critical for global production of clean and sustainable chemical fuels. Here, via modulating the metallic 1T phase in 2H MoS₂ nanosheets, we greatly improved the conductivity and effective active sites for highly efficient electrocatalytic hydrogen evolution. The as-synthesized 1T-2H MoS₂ electrocatalyst with a high 1T-phase content of 50% can significantly increase the charge concentration by an order of magnitude and triple the effective active surface sites, successfully boosting the hydrogen evolution reaction (HER) at a quite low overpotential of 126 mV at 10 mA/cm² and a small Tafel slope of 35 mV/dec. Ultraviolet photoelectron spectroscopy and electrochemical characterization reveal that the valence band edges of 1T-2H MoS₂ are upshifted by 0.15-0.36 eV, which obviously enhances the charge transfer ability of the surface active sites in the basal plane of MoS₂ for high HER performance. (Chemical Equation Presented).

Original language	English (US)
Pages (from-to)	15071-15077
Number of pages	7
Journal	JOURNAL OF PHYSICAL CHEMISTRY C
Volume	121
Issue number	28
DOIs	https://doi.org/10.1021/acs.jpcc.7b03103
State	Published - Jul 20 2017

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 21533007, 11621063, 21603207, U1532265, 11435012, 11305174, and 11422547), the Fundamental Research Funds for the Central Universities (WK2310000054), and the China Postdoctoral Science Foundation (2016M590581).

Publisher Copyright:
© 2017 American Chemical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Access to Document

10.1021/acs.jpcc.7b03103

Cite this

@article{0aa41e45d7c84bdcbb7150c200bfe857,

title = "High-Content Metallic 1T Phase in MoS2-Based Electrocatalyst for Efficient Hydrogen Evolution",

abstract = "Realizing high-efficiency hydrogen evolution in cost-effective and long-lasting electrocatalysts is critical for global production of clean and sustainable chemical fuels. Here, via modulating the metallic 1T phase in 2H MoS2 nanosheets, we greatly improved the conductivity and effective active sites for highly efficient electrocatalytic hydrogen evolution. The as-synthesized 1T-2H MoS2 electrocatalyst with a high 1T-phase content of 50% can significantly increase the charge concentration by an order of magnitude and triple the effective active surface sites, successfully boosting the hydrogen evolution reaction (HER) at a quite low overpotential of 126 mV at 10 mA/cm2 and a small Tafel slope of 35 mV/dec. Ultraviolet photoelectron spectroscopy and electrochemical characterization reveal that the valence band edges of 1T-2H MoS2 are upshifted by 0.15-0.36 eV, which obviously enhances the charge transfer ability of the surface active sites in the basal plane of MoS2 for high HER performance. (Chemical Equation Presented).",

author = "Liang Cai and Weiren Cheng and Tao Yao and Yuanyuan Huang and Fumin Tang and Qinghua Liu and Wei Liu and Zhihu Sun and Fengchun Hu and Yong Jiang and Wensheng Yan and Shiqiang Wei",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 21533007, 11621063, 21603207, U1532265, 11435012, 11305174, and 11422547), the Fundamental Research Funds for the Central Universities (WK2310000054), and the China Postdoctoral Science Foundation (2016M590581). Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

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AU - Cai, Liang

AU - Cheng, Weiren

AU - Yao, Tao

AU - Huang, Yuanyuan

AU - Tang, Fumin

AU - Liu, Qinghua

AU - Liu, Wei

AU - Sun, Zhihu

AU - Hu, Fengchun

AU - Jiang, Yong

AU - Yan, Wensheng

AU - Wei, Shiqiang

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China (Grant Nos. 21533007, 11621063, 21603207, U1532265, 11435012, 11305174, and 11422547), the Fundamental Research Funds for the Central Universities (WK2310000054), and the China Postdoctoral Science Foundation (2016M590581). Publisher Copyright: © 2017 American Chemical Society.

PY - 2017/7/20

Y1 - 2017/7/20

N2 - Realizing high-efficiency hydrogen evolution in cost-effective and long-lasting electrocatalysts is critical for global production of clean and sustainable chemical fuels. Here, via modulating the metallic 1T phase in 2H MoS2 nanosheets, we greatly improved the conductivity and effective active sites for highly efficient electrocatalytic hydrogen evolution. The as-synthesized 1T-2H MoS2 electrocatalyst with a high 1T-phase content of 50% can significantly increase the charge concentration by an order of magnitude and triple the effective active surface sites, successfully boosting the hydrogen evolution reaction (HER) at a quite low overpotential of 126 mV at 10 mA/cm2 and a small Tafel slope of 35 mV/dec. Ultraviolet photoelectron spectroscopy and electrochemical characterization reveal that the valence band edges of 1T-2H MoS2 are upshifted by 0.15-0.36 eV, which obviously enhances the charge transfer ability of the surface active sites in the basal plane of MoS2 for high HER performance. (Chemical Equation Presented).

AB - Realizing high-efficiency hydrogen evolution in cost-effective and long-lasting electrocatalysts is critical for global production of clean and sustainable chemical fuels. Here, via modulating the metallic 1T phase in 2H MoS2 nanosheets, we greatly improved the conductivity and effective active sites for highly efficient electrocatalytic hydrogen evolution. The as-synthesized 1T-2H MoS2 electrocatalyst with a high 1T-phase content of 50% can significantly increase the charge concentration by an order of magnitude and triple the effective active surface sites, successfully boosting the hydrogen evolution reaction (HER) at a quite low overpotential of 126 mV at 10 mA/cm2 and a small Tafel slope of 35 mV/dec. Ultraviolet photoelectron spectroscopy and electrochemical characterization reveal that the valence band edges of 1T-2H MoS2 are upshifted by 0.15-0.36 eV, which obviously enhances the charge transfer ability of the surface active sites in the basal plane of MoS2 for high HER performance. (Chemical Equation Presented).

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