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RhMoS 2 Nanocomposite Catalysts with Pt‐Like Activity for Hydrogen Evolution Reaction
Author(s) -
Cheng Yafei,
Lu Shunkai,
Liao Fan,
Liu Liangbin,
Li Yanqing,
Shao Mingwang
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201700359
Subject(s) - tafel equation , nanocomposite , materials science , catalysis , electrochemistry , hydrogen , metal , chemical engineering , nanotechnology , electrode , chemistry , metallurgy , organic chemistry , engineering
High overpotentials and low efficiency are two main factors that restrict the practical application for MoS 2 , the most promising candidate for hydrogen evolution catalysis. Here, RhMoS 2 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% RhMoS 2 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 mg metal −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% RhMoS 2 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 RhMoS 2 nanocomposites may be attributed to the hydrogen spillover from Rh to MoS 2 .