G
G.A. Cifredo
Researcher at University of Cádiz
Publications - 47
Citations - 1536
G.A. Cifredo is an academic researcher from University of Cádiz. The author has contributed to research in topics: Catalysis & Rhodium. The author has an hindex of 23, co-authored 47 publications receiving 1435 citations. Previous affiliations of G.A. Cifredo include University of Liverpool & University of California.
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Journal ArticleDOI
Hydrogen chemisorption on ceria: influence of the oxide surface area and degree of reduction
Serafín Bernal,José J. Calvino,G.A. Cifredo,José M. Gatica,Jose´ A. Pe´rez Omil,José M. Pintado +5 more
TL;DR: In this paper, the authors showed that hydrogen can be desorbed from ceria as reversible adsorption and reversible adaption depending on the reduction temperature, and that H2 was the only desorption product.
Journal ArticleDOI
HREM study of the behaviour of a Rh/CeO2 catalyst under high temperature reducing and oxidizing conditions
TL;DR: In this article, a series of Rh/CeO 2 catalysts were reduced at temperatures ranging from 623 to 1173 K, and the presence of a well-defined structural relationship between metal and support was observed.
Journal ArticleDOI
Reversibility of hydrogen chemisorption on a ceria-supported rhodium catalyst
Serafín Bernal,J.J. Calving,G.A. Cifredo,José M. Rodríguez-Izquierdo,Vincent Perrichon,A. Laachir +5 more
TL;DR: In this paper, it was shown that at room temperature, in the presence of highly dispersed rhodium, ceria chemisorbs large amounts of hydrogen, which leads to the reduction of ceria to an extent of 21% of the total amount of cerium ions present in the sample.
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Microstructural and chemical properties of ceria-supported rhodium catalysts reduced at 773 K
Serafín Bernal,F.J. Botana,José J. Calvino,Miguel A. Cauqui,G.A. Cifredo,A. Jobacho,José M. Pintado,José M. Rodríguez-Izquierdo +7 more
TL;DR: In this article, the chemical and micro-structural characterization of a series of Rh/CeO 2 catalysts is reported. But no dramatic effect of the reduction temperature on the catalytic activity for benzene hydrogenation has been found.
Journal ArticleDOI
Influence of the calcination temperature on the nano-structural properties, surface basicity, and catalytic behavior of alumina-supported lanthana samples
Zouhair Boukha,Loubna Fitian,Miguel López-Haro,Manuel Mora,José Rafael Ruiz,César Jiménez-Sanchidrián,Ginesa Blanco,José J. Calvino,G.A. Cifredo,Susana Trasobares,Serafín Bernal +10 more
TL;DR: In this article, a series of three La2O3/Al 2O3 samples, with a lanthana loading close to the theoretical monolayer, obtained by calcination at 773, 973, or 1173 K from a common precursor, were investigated.