AgWOS Bimetallic Oxysulfides With Synergistic Coupling of Heterovalent States and Vacancy Defects for Boosting Photocatalytic Hydrogen Evolution: An Insightful Case of the W‐Doping Plus Hydrazine‐Driven Design

ABSTRACT Recent studies have indicated that the heterovalent states and vacancy defect structures in bimetallic oxysulfide play a crucial role in pollutant reduction reactions. However, systematic investigations into the synergistic coupling between heterovalent states and vacancy defect structures during the photocatalytic hydrogen evolution reaction (PHER) remain scarce. Herein, a tungsten/oxygen (W/O) co‐doped Ag 2 S bimetallic oxysulfide (AgWOS) with heterovalent W 5+ /W 6+ states and sulfur vacancy (Vs) defects was synthesized via a facile thermohydrolysis method. The combination of W‐doping and hydrazine‐driven conditions induces abundant Vs defects, which act as active sites for water adsorption and…

• NN
  National Natural Science Foundation of China

  Award: 31000269
• NS
  Natural Science Foundation of Fujian Province

  Award: 2021J01100