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Evolution of H2 photoproduction with Cu content on CuOx-TiO2 composite catalysts prepared by a microemulsion method

Paper ID Volume ID Publish Year Pages File Format Full-Text
44873 46375 2015 9 PDF Available
Title
Evolution of H2 photoproduction with Cu content on CuOx-TiO2 composite catalysts prepared by a microemulsion method
Abstract

•CuOx-TiO2 photocatalysts are prepared by a single pot microemulsion method.•Two maxima vs. copper content are encountered in the photo-production of hydrogen.•These maxima correspond to different copper species.•Intensification of the Cu–Ti system may be approached by two independent pathways.

Copper oxides in contact with anatase correspond to promising materials with high activity in the photoproduction 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 multitechnique 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.

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Keywords
H2 production; Copper; Titania; Doping; Surface species
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Evolution of H2 photoproduction with Cu content on CuOx-TiO2 composite catalysts prepared by a microemulsion method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 163, February 2015, Pages 214–222
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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