Search

Your search keyword '"Hidalgo-Carrillo, Jesús"' showing total 14 results
Start Over Author "Hidalgo-Carrillo, Jesús" Publisher elsevier b.v.
14 results on '"Hidalgo-Carrillo, Jesús"'

14. EPR and CV studies cast further light on the origin of the enhanced hydrogen production through glycerol photoreforming on CuO:TiO2 physical mixtures.

Author

Martín-Gómez, Juan, Hidalgo-Carrillo, Jesús, Montes, Vicente, Estévez-Toledano, Rafael C., Escamilla, Juan C., Marinas, Alberto, and Urbano, Francisco J.

Subjects
CONDUCTION bands, PRECIOUS metals, HYDROGEN production, CONDUCTION electrons, MIXTURES, GLYCERIN
Abstract

Different CuO nanoparticles were synthesized and tested in CuO:TiO 2 physical mixtures for hydrogen production through glycerol photoreforming. CuO alone was inactive whereas its presence in CuO:TiO 2 mixtures significantly improved the photoactivity of TiO 2 , with smaller CuO nanoparticles leading to higher hydrogen productions. Results obtained through combination of EPR and CV studies suggested the existence of a Cu(II)-Cu0 catalytic cycle. Thus, electrons promoted to the conduction band of titania could be used for CuO reduction to Cu which in turn would enable hydrogen production regenerating Cu2+ for a new catalytic cycle. All in all, a hydrogen production of 88 mmol·g−1 was obtained after 5 h on a CuO:TiO 2 (10% w/w) physical mixture which is comparable to that achieved in a previous study under identical reaction conditions on 1.5%Pt/TiO 2. [Display omitted] • H 2 production via glycerol photoreforming enhanced on CuO:TiO 2 physical mixtures. • H 2 production values in the same order as those found for supported noble metals. • EPR studies evidenced the formation of Cu(I) or Cu0 species on UV irradiation. • CV studies suggested the existence of a CuO to Cu(0) photocatalytic cycle. • Electrons for H 2 generation are first transferred from titania to copper species. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results