Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 163, Issue -, Pages 214-222Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2014.08.005
Keywords
H-2 production; Copper; Titania; Doping; Surface species
Funding
- CSIC
- Spanish MINECO
- [ENE2013-46624-C4-1-R]
- [P09-FQM-4570]
- [ENE2011-24412]
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Copper oxides in contact with anatase correspond to promising materials with high activity in the photo-production of hydrogen by aqueous reforming of alcohols. By a single pot microemulsion method we obtained a series of Cu-Ti composite systems with controlled copper content in the 0-25 wt.% range. The scanning of such a wide range of composition led to the discovery of two well differentiated maxima in the photo-reaction performance. These maxima present rather high and relatively similar reaction rates and photonic efficiencies but are ascribed to the presence of different copper species. A multi-technique analysis of the materials indicates that the maxima obtained comes from optimizing different steps of the reaction; while the first would be connected with a positive effect on anatase charge handling performance the second seems exclusively related to electron capture by surface copper species. (C) 2014 Elsevier B.V. All rights reserved.
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