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 language | English |
---|---|
Pages (from-to) | 3909-3923 |
Number of pages | 15 |
Journal | Catalysis Science and Technology |
Volume | 14 |
Issue number | 14 |
Early online date | 14 Jun 2024 |
DOIs | |
Publication status | Published - 21 Jul 2024 |
Keywords
- Photocatalysts
- Nanoparticles
- Hydrogen peroxide