Defective ZnIn 2 S 4 Nanosheets for Visible-Light and Sacrificial-Agent-Free H 2 O 2 Photosynthesis via O 2 /H 2 O Redox

H2O2 photosynthesis has attracted great interest in harvesting and converting solar energy to chemical energy. Nevertheless, the high-efficiency process of H2O2 photosynthesis is driven by the low H2O2 productivity due to the recombination of photogenerated electron–hole pairs, especially in the absence of a sacrificial agent. In this work, we demonstrate that ultrathin ZnIn2S4 nanosheets with S vacancies (Sv-ZIS) can serve as highly efficient catalysts for H2O2 photosynthesis via O2/H2O redox. Mechanism studies confirm that Sv in ZIS can extend the lifetimes of photogenerated carriers and suppress their recombination, which triggers the O2 reduction and H2O oxidation to H2O2 through radical initiation.…

• NN
  National Natural Science Foundation of China

  Awards: U21A20327, 22121001, 22025108
• MO
  Ministry of Science and Technology of the People's Republic of China

  Award: 2017YFA0208200
• NS
  Natural Science Foundation of Guangdong Province

  Award: 2021B1515020081
• XU
  Xiamen University
• NK
  National Key Research and Development Program of China

  Award: 2020YFB1505802