P and Se Binary Vacancies and Heterostructures Modulated MoP/MoSe Electrocatalysts for Improving Hydrogen Evolution and Coupling Electricity Generation.

It is not enough to develop an ideal hydrogen evolution reaction (HER) electrocatalysts by single strategy. Here, the HER performances are significantly improved by the combined strategies of P and Se binary vacancies and heterostructure engineering, which is rarely explored and remain unclear. As a result, the overpotentials of MoP/MoSe -H heterostructures rich in P and Se binary vacancies are 47 and 110 mV at 10 mA cm in 1 m KOH and 0.