3D MoS2-rGO@Mo nanohybrids for enhanced hydrogen evolution: The importance of the synergy on the Volmer reaction. (1st September 2018)

• Record Type: Journal Article
• Authors: He, Binhong; Chen, Liang; Jing, Mingjun; Zhou, Minjie; Hou, Zhaohui; Chen, Xiaobo
• Is Part Of: Electrochimica acta. Volume 283(2018)
• Page Start: 357
• Page End: 365
• Publication Date: 2018-09-01
• Subjects: Water electrolysis -- Hydrogen evolution reaction -- Molybdenum sulfide -- Reduced graphene oxide; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.06.168
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Hydrogen evolution reaction (HER) through electrocatalytic water splitting is regarded as a promising route to produce hydrogen in a large scale. Molybdenum disulfide (MoS2 ) has been reported as a transition metal electrocatalysts, but generally with a poor activity, e.g. 540 mV overpotential at 10 mA cm −2 and Tafel slope value of 84 mV dec −1 . A 3D MoS2 -rGO@Mo nanohybrids, a three-dimensional MoS2 nanosheets network coated with reduced graphene oxide (rGO) on molybdenum mesh, is demonstrated as one of the best MoS2 -based electrocatalysts. It delivers a benchmark current density of 10 mA cm −2 under a small overpotential (∼123 mV) with a low Tafel slope (∼62 mV dec −1 ), and an excellent stability performance. Its excellent performance can be attributed to the synergy between the 3D MoS2 and rGO with abundant active sites and high conductivity which leads to a faster water dissociation on the surface in the Volmer step. Graphical abstract: 3D MoS2 -rGO@Mo catalyst was fabricated by a sample one-pot hydrothermal process, which exhibits excellent HER performance in alkaline solution. Image 1