RhMoS2 Nanocomposite Catalysts with Pt‐Like Activity for Hydrogen Evolution Reaction. (24th April 2017)

• Record Type: Journal Article
• Authors: Cheng, Yafei; Lu, Shunkai; Liao, Fan; Liu, Liangbin; Li, Yanqing; Shao, Mingwang
• Is Part Of: Advanced functional materials. Volume 27:Number 23(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-04-24
• Subjects: hydrogen evolution reaction -- hydrogen spillover -- MoS2 -- Pt‐like materials -- rhodium; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201700359
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : High overpotentials and low efficiency are two main factors that restrict the practical application for MoS2, the most promising candidate for hydrogen evolution catalysis. Here, RhMoS2 nanocomposites, the addition of a small amount of Rh (5.2 wt%), exhibit the superior electrochemical hydrogen evolution performance with low overpotentials, small Tafel slope (24 mV dec −1 ), and long term of stability. Experimental results reveal that 5.2 wt% RhMoS2 nanocomposite, even exceeding the commercial 20 wt% Pt/C when the potential is less than −0.18 V, exhibits an excellent mass activity of 13.87 A mgmetal −1 at −0.25 V, four times as large as that of the commercial 20 wt% Pt/C catalyst. The hydrogen yield of 5.2 wt% RhMoS2 nanocomposite is 26.3% larger than that of the commercial 20 wt% Pt/C at the potential of −0.25 V. The dramatically improved electrocatalytic performance of RhMoS2 nanocomposites may be attributed to the hydrogen spillover from Rh to MoS2 . Abstract : RhMoS2 nanocomposite (5.2 wt%) exhibits dramatic hydrogen evolution reaction activity with a lower Tafel slope and higher mass activity than those of 20 wt% Pt/C catalysts. This superior electrocatalytic performance may be attributed to the hydrogen spillover from Rh to MoS2 .