Gold–Copper Nanoalloys Supported on TiO 2 as Photocatalysts for CO 2 Reduction by Water
Instituto de Tecnología Química · Universitat Politècnica de València
Abstract
Commercial P25 modified by Au-Cu alloy nanoparticles as thin film exhibits, for CO2 reduction by water under sun simulated light, a rate of methane production above 2000 μmol (g of photocatalyst)(-1) h(-1). Although evolution of hydrogen is observed and O2 and ethane detected, the selectivity of conduction band electrons for methane formation is almost complete, about 97%. This photocatalytic behavior is completely different from that measured for Au/P25 (hydrogen evolution) and Cu/P25 (lower activity, but similar methane selectivity). Characterization by TEM, XPS, and UV-vis spectroscopy shows that Au and Cu are alloyed in the nanoparticles. FT-IR spectroscopy and chemical analysis have allowed one to detect…
Citation impact
- FWCI
- 14.96
- Percentile
- 100%
- References
- 47
Authors
4- ȘNȘtefan NeațuCorresponding
Instituto de Tecnología Química, Universitat Politècnica de València
- JMJ.A. Maciá-Agulló
Universitat Politècnica de València, Instituto de Tecnología Química
- PCPatricia Concepción
Instituto de Tecnología Química, Universitat Politècnica de València
- HGHermenegildo Garcı́a
Instituto de Tecnología Química, Universitat Politècnica de València
Topics & keywords
- Chemistry
- Copper
- Reduction (mathematics)
- Chemical reduction
- Photocatalysis
- Chemical engineering
- Inorganic chemistry
- Nanotechnology
- Clean water and sanitation