Journal
JOURNAL OF CATALYSIS
Volume 303, Issue -, Pages 141-155Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2013.03.014
Keywords
Photocatalysis; TiO2; Anatase; Hydrogen production; Biomass reforming; RuO2; Single-site tin; Photoelectrolysis cell
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Funding
- NSFC [21003021, 21173044, 21203029]
- National Science Foundation for Fostering Talents in Basic Research of China [J1103303]
- Natural Science Foundation of Fujian Province of the People's Republic of China [2010J05024]
- Science and Technology project of the Education Office of Fujian Province of the People's Republic of China [JA12017]
- National Basic Research Program of China (973 Program) [2012CB722607]
- Science and Technology Project of Fuzhou University [2010-XQ-08]
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This work offers an engineering guide to obtaining highly efficient photocatalysts for hydrogen production. Synergetic enhancement of photocatalytic hydrogen evolution from biomass/water solution is achieved by co-modifying anatase TiO2 with single-site Sn-oxo species and RuO2 nanoparticles. Detailed characterization and analysis clearly reveal that such TiO2-based composites can function as photoelectrolysis cells, where RuO2 and SnOx species serve, respectively, as an anode and a cathode and TiO2 is mainly responsible for the conversion of photons into electrical energy and the (OH)-O-center dot formation. Electron paramagnetic resonance and infrared spectroscopy studies suggest a free radical reaction pathway triggered by the hole oxidation for the photocatalytic reforming of biomass. The CxHyOz renewables undergo one or more processes for the sequential oxidation of alcohol to aldehyde, acid, and finally CO2 and CO. The activity results indicate that proton reduction is the controlling-rate step of the overall photoreforming reaction. (c) 2013 Elsevier Inc. All rights reserved.
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