Issue 26, 2019

Designing Pd/O co-doped MoSx for boosting the hydrogen evolution reaction

Abstract

Molybdenum disulfide has great potential as an electrocatalyst to drive the hydrogen evolution reaction (HER), but HER catalysts based on transition metal (TM) and non-metal (NM) co-doped MoS2 have rarely been reported because of the difficulty of preparation. Herein, we design an upgraded sacrificial-counter-electrode method to create a favorable environment for atomic-scale substitution to synthesize Pd/O co-doped MoSx (sub-MoSx/CNTs/Pdgly), which exhibits a small overpotential of 23 mV at a current density of 10 mA cm−2, a low Tafel slope of 18 mV dec−1 and good catalytic stability. Density functional theory (DFT) calculations reveal that the Pd/O co-doped MoS2 tends to form defect-pairs (PdMo + OS) in MoS2, and the unsaturated S atoms around the defects enormously promote the HER activity.

Graphical abstract: Designing Pd/O co-doped MoSx for boosting the hydrogen evolution reaction

Supplementary files

Article information

Article type
Communication
Submitted
20 Mar 2019
Accepted
11 Jun 2019
First published
11 Jun 2019

J. Mater. Chem. A, 2019,7, 15599-15606

Designing Pd/O co-doped MoSx for boosting the hydrogen evolution reaction

Y. Zhan, X. Zhou, H. Nie, X. Xu, X. Zheng, J. Hou, H. Duan, S. Huang and Z. Yang, J. Mater. Chem. A, 2019, 7, 15599 DOI: 10.1039/C9TA02997D

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