Efficient hole abstraction for highly selective oxidative coupling of methane by Au-sputtered TiO2 photocatalysts
University College London · University of Liverpool · +2 more institutions
Abstract
Abstract Photocatalytic oxidative coupling of methane (OCM) produces C 2 molecules that can be used as building blocks for synthesis of fuels and chemicals. However, the yield rate and the selectivity of C 2 products are still moderate due to the stable nature of methane molecules. Here we develop a Au nanocluster-loaded TiO 2 photocatalyst by a sputtering approach, achieving a high methane conversion rate of 1.1 mmol h −1 , C 2 selectivity of ~90% and apparent quantum efficiency of 10.3 ± 0.6%. The high C 2 /C 2+ yield rate is on the same order of magnitude as the benchmark thermal catalysts in OCM processes operated at high temperature (>680 °C). Au nanoparticles are shown to prolong TiO 2 photoelectron…
Citation impact
- FWCI
- 20.26
- Percentile
- 100%
- References
- 36
Authors
9Topics & keywords
- Oxidative coupling of methane
- Methane
- Catalysis
- Selectivity
- Photocatalysis
- Materials science
- Yield (engineering)
- Quantum yield