Photocatalytic H2O2 production over photocatalysts prepared by phosphine-protected Au101 nanoparticles on WO3

Imran Hakim Abd Rahim, Xuan Yin Lee, Abdulrahman S Alotabi, D J Osborn, Sunita Gautam Adhikari, Gunther G Andersson, Gregory F Metha, Rohul H Adnan

Research output: Contribution to journalArticlepeer-review

Abstract

Photocatalytic H 2O 2 synthesis is an appealing and feasible strategy to replace the energy-intensive, tedious, and waste-generating anthraquinone process. This work investigated photocatalytic H 2O 2 production using monodisperse gold nanoclusters Au 101(PPh 3) 21Cl 5 supported on WO 3. Both uncalcined and calcined Au 101/WO 3 photocatalysts produce over 75 mM g −1 h −1 of H 2O 2 under UV light irradiation while pure WO 3 is inactive. At early times (up to 30 min), the production rate of H 2O 2 from calcined Au 101/WO 3 reaches 173 mM g −1 h −1 and is almost double the rate of the uncalcined catalyst (93 mM g −1 h −1). The roles of Au 101 have been identified to reduce the charge carrier recombination and provide the active sites for O 2 reduction which significantly enhances the photoactivity. The higher photoactivity of calcined versus uncalcined Au 101/WO 3 can be attributed to the strong metal-support interaction and aggregated Au 101.

Original languageEnglish
Pages (from-to)3909-3923
Number of pages15
JournalCatalysis Science and Technology
Volume14
Issue number14
Early online date14 Jun 2024
DOIs
Publication statusPublished - 21 Jul 2024

Keywords

  • Photocatalysts
  • Nanoparticles
  • Hydrogen peroxide

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