Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 6, Issue 7, Pages 2211-2215Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ee40656c
Keywords
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Funding
- Spanish Ministry of Economy and Competitiveness through the Severo Ochoa program
- Consolider Ingenio Multicat
- EU
- region of Calabria
- [CTQ-2012-363531]
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Gold nanoparticles supported on P25 TiO2 act as highly efficient photocatalysts for promoting the simultaneous H2O reduction to H-2 and CO oxidation to CO2. This photocatalytic process can be performed using simulated solar light as well as light from a LED quasi monochromatic centred at 450 nm, indicating that not only UV but also visible light promotes the reaction. This novel photocatalytic reaction corresponds to the water gas shift which is an endothermic process that is currently carried out on a large industrial scale at temperatures about 350 degrees C. In contrast, the photocatalytic process is performed at ambient temperature with no other energy requirement than sunlight. Other related TiO2 and CeO2 photocatalysts containing noble metals (Pt or Pd) behave similarly, but with lower efficiency both in the UV and in the visible region than Au/TiO2.
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