Regulation of Sulfur Atoms in MoSx by Magneto-Electrodeposition for Hydrogen Evolution Reaction

Changdian Li; Qian Chen; Ruobing Zheng; Jie Huan; Jin Bai; Lili Zhu; Yanan Huang; Xuebin Zhu; Yuping Sun

doi:10.1002/smll.202308729

Regulation of Sulfur Atoms in MoS_x by Magneto-Electrodeposition for Hydrogen Evolution Reaction

Small. 2023 Dec 11:e2308729. doi: 10.1002/smll.202308729. Online ahead of print.

Authors

Changdian Li^{1

2}, Qian Chen^{1

2}, Ruobing Zheng^{1

2}, Jie Huan^{1

2}, Jin Bai¹, Lili Zhu¹, Yanan Huang¹, Xuebin Zhu¹, Yuping Sun^{1

3

4}

Affiliations

¹ Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
² Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, P. R. China.
³ High Magnetic Field Laboratory, HFIPS, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
⁴ Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.

PMID: 38078778
DOI: 10.1002/smll.202308729

Abstract

Compared with crystalline molybdenum sulfide (MoS₂ ) employed as an efficient hydrogen evolution reaction (HER) catalyst, amorphous MoS_x exhibits better activity. To synthesize amorphous MoS_x , electrodeposition serving as a convenient and time-saving method is successfully applied. However, the loading mass is hindered by limited mass transfer efficiency and the available active sites require further improvement. Herein, magneto-electrodeposition is developed to synthesize MoS_x with magnetic fields up to 9 T to investigate the effects of a magnetic field in the electrodeposition processing, as well as the induced electrochemical performance. Owing to the magneto-hydrodynamic effect, the loading mass of MoS_x is obviously increased, and the terminal S^2- serving as the active site is enhanced. The optimized MoS_x catalyst delivers outstanding HER performance, achieving an overpotential of 50 mV at a current density of 10 mA cm^-2 and the corresponding Tafel slope of 59 mV dec^-1 . The introduction of a magnetic field during the electrodeposition process will provide a novel route to prepare amorphous MoS_x with improved electrochemical performance.

Keywords: MoSx; hydrogen evolution reaction; magneto-electrodeposition; magneto-hydrodynamic effect.

Abstract

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