Mo−N Bonds Effect Between MoSx Coupling With CoN For Efficient Photocatalytic Hydrogen Production

Abstract

AbstractThe facet‐engineered surface and interface design has attracted much attention in the preparation of efficient photocatalysts. Polyvinylpyrrolidone (PVP) is used as the morphological modifier to prepare 3D MoSx in this work. Benefit by its suitable conduction band position and good conductivity, CoN accepts photo‐induced electrons from MoSx as an excellent electron acceptor in the form of active sites. With the addition of CoN, hydrogen evolution performance of MoSx has been greatly improved by building the Mo−N bond since the form of Mo−N bond successfully shorten electron transport routes. The reason for the improved hydrogen precipitation efficiency is demonstrated by PL, XPS, and electrochemical characterization. The H2 production activity of MoSx@CoN with the best mass ratio of MoSx to CoN is up to 7617.5 μmol/g/h, and the hydrogen production stability of MoSx@CoN is also considerable. These findings provide new insights for the preparation of highly efficient photocatalytic hydrogen evolution materials.