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

AuthorsKubacka, Anna ; Muñoz-Batista, Mario J. ; Fernández-García, Marcos; Obregón, Sergio ; Colón, Gerardo
KeywordsH2 production
Surface species
Issue DateFeb-2015
CitationApplied Catalysis B: Environmental 163: 214-222 (2015)
AbstractCopper 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.
Publisher version (URL)https://doi.org/10.1016/j.apcatb.2014.08.005
Appears in Collections:(ICMS) Artículos
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