HER on NiS/NiSnS Hydrogen energy though hydrogen evolution reaction(HER)is regarded as a desirable substitute for non-renewable fossil fuels; 3d transition metal sulphides present higher catalytic efficiency due to enhancement of conductivity and number of electrochemically active surface sites. >Collaborations with the Institute for 50 Clean Energy Advanced Materials at -PC -Ni,S,Ni,Sn,S-ii N5/NF 100 -Ni,5 Ni,5n,S-i NS/NF -Ni,5 Ni,5m,5-ii NS/NF Southwest University,Chongqing; -NiS,NS/NE .150 -Nifo单 The Ni,Sn2S,/NiS,>porous nanosheets 0.6 -0.4 -0.2 0.0 02 0.4 Potential (V vs.RHE) -inital contain the characteristic of NiS,and Interface (wo vu) -after 20 hours Ni,Sn2S2 phases: -50 The NisSn2S2/NigS2 Shows a very low overpotential and a long-time stability -100 -0.8-0.6-0.4-0.20.0 for HER activity. Potential (V ys.RHE)The catalytic activity of Ni3S2 and Ni2Sn3S2 toward hydrogen evolution reaction  Hydrogen energy though hydrogen evolution reaction (HER) is regarded as a desirable substitute for non-renewable fossil fuels ;  3d transition metal sulphides present higher catalytic efficiency due to enhancement of conductivity and number of electrochemically active surface sites. ➢ Collaborations with the Institute for Clean Energy & Advanced Materials at Southwest University, Chongqing; ➢ The Ni3Sn2S2 /Ni3S2 porous nanosheets contain the characteristic of Ni3S2 and Ni3Sn2S2 phases; ➢ The Ni3Sn2S2 /Ni3S2 shows a very low overpotential and a long-time stability for HER activity. HER on NiS/NiSnS