Structural regulation of amorphous molybdenum sulfide by atomic palladium doping for hydrogen evolution
Yao Xiao1, Cuiying Tan1, Fangui Zeng1
1College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
Abstract:
Molybdenum sulfide materials have long been considered as attractive non-precious-metal electrocatalysts for the hydrogen evolution reaction (HER). However, comparing with the crystalline counterpart, amorphous MoSx has been less investigated previously. We here propose to increase the catalytical activity of a-MoSx by raising the reactant concentration at the catalytic interface via a chemical doping approach. The reconstruction of coordination structure of a-MoSx via Pd doping induces the formation of abundant unsaturated S atoms. Moreover, the reactant friendly catalytic interface is constructed through introducing hydrophilic groups to a-MoSx. The doped a-MoSx catalyst exhibits significantly enhanced HER activity in both acid and alkaline media.
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