Phosphorus-Doping-Induced Optimization of Atomic Hydrogen Binding Energy in MoSe2 under High Coverage for Efficient Electrocatalytic Hydrogen Evolution Reactions

摘要

Self-standing two-dimensional P-doped molybdenum disele- nide (MoSe2) nanosheets were synthesized on carbon fiber paper (CFP) (P-doped MoSe2/CFP) using a hydrothermal reaction followed by phosphorization and were subsequently used as a high-efficiency hydrogen evolution reaction (HER) electrocatalyst. Nanosheet aggregation was remarkably inhib- ited, and numerous active sites were exposed. The H adsorption and desorption capacities of MoSe2 were optimized by doping P atoms in the MoSe2 lattice. Electrochemical testing indicated that the overpotential (η50) required by P-doped MoSe2/CFP was only 186 mV, which was much lower than that of the as-prepared MoSe2/CFP (237 mV).