Rational design of atomically dispersed nickel active sites in β-Mo 2 C for the hydrogen evolution reaction at all pH values

Atomically dispersed Ni species on β-Mo2C (Ni/β-Mo2C) is designed and synthesized through a simple thermal treatment process. Benefitting from the synergistic effect between Ni species and β-Mo2C, Ni/β-Mo2C exhibits high activities for the HER at all pH values.