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Influencia del tratamiento con diborano sobre la actividad catalítica de óxidos metálicos

 

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Opened Access Influencia del tratamiento con diborano sobre la actividad catalítica de óxidos metálicos
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Author: Criado Luque, José Manuel
González Vila, Francisco Javier
Martín Martínez, Francisco
Munuera Contreras, Guillermo
Trillo de Leyva, José María
Department: Universidad de Sevilla. Departamento de Química Inorgánica
Universidad de Sevilla. Departamento de Nutrición y Bromatología, Toxicología y Medicina Legal
Date: 1968
Published in: Anales de la Real Sociedad Española de Física y Química. Serie B-Química, LXIV (5), 463-474.
Document type: Article
Abstract: In a previous work a relationship was found between the amount of OH groups at the surface of TiO2 and Cr203 catalysts, and their activity in fortnic acid dehydration. In this paper the effect of the treatment with diborane on the activity of those catalyst has been studied. The activation energy and frequency factor for dehydration reaction are largely afected in this way, but no change was recorded in the activity of the oxides toward dehydrogenation. From the I.R. study of the treated surfaces, the presence of = B - OH has been stablisbed. Tbese groups must be help to the surface on the same possitions that the OH in the untreated oxides, and can be removed when the sample is washed with hot water. This restores the OH groups and the catalytic activity of the sample to its original value. Cbanges in EH2 tor the set of Cr203 oxides, sintered between 400 and 1000 ºC, are explained as due to Cr6+ in tetrahedral interstices at the Cr203- corundum lattice.
Cite: Criado Luque, J.M., González Vila, F.J., Martín Martínez, F., Munuera, G. y Trillo de Leyva, J.M. (1968). Influencia del tratamiento con diborano sobre la actividad catalítica de óxidos metálicos. Anales de la Real Sociedad Española de Física y Química. Serie B-Química, LXIV (5), 463-474.
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URI: http://hdl.handle.net/11441/66276

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