Nanosheet MoS<sub>2</sub>-Decorated MoO<sub>2</sub> on Porous Carbon as Electrodes for Efficient Hydrogen Evolution
Mengliang Hu, Zhinan Wang, Mingli Li, Chuigen Guo, Liping Li
Abstract
To optimize the disadvantage of low conductivity and few active sites of MoS2-based catalysts, in situ growth on carbonized wood (CW) through coupling of conductive materials and MoS2 can be a proven strategy. Herein, a three-dimensional self-supporting electrode with a heterostructure of nanosheet MoS2-decorated MoO2 grown on CW (MoS2-MoO2/CW) is prepared for the hydrogen evolution reaction (HER) via a simple two-step chemical vapor deposition strategy. The coupling of MoS2 and MoO2 with excellent electrical conductivity and the rational design of three-dimensional self-supporting electrodes are the key factors to improve the catalytic performance. The designed MoS2-MoO2/CW electrode has a potential of 148 mV at a current density of 10 mA cm–2, a low Tafel slope of 86.7 mV dec–1, and outstanding long-term stability in 0.5 M H2SO4. Consequently, wood-based porous carbon electrodes with a heterogeneous structure of nanosheet MoS2-decorated MoO2 can provide meaningful references for MoS2-based electrocatalysts.