Title: | Rh-MoS2 Nanocomposite Catalysts with Pt-Like Activity for Hydrogen Evolution Reaction |
Authors: | Yafei Cheng, Shunkai Lu, Fan Liao, Liangbin Liu, Yanqing Li,* and Mingwang Shao* |
Institution: | Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China |
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 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% 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. |
IF: | 12.124 |
Link: | http://onlinelibrary.wiley.com/doi/10.1002/adfm.201700359/full |
Editor: Danting Xiang