In situ transmission electron microscopy investigation of Ce(IV) and Pr(IV) reducibility in a Rh (1%)/Ce0.8Pr0.2O2−x catalyst

C. López-Cartes; S. Bernal; J. J. Calvino; M. A. Cauqui; G. Blanco; J. A. Pérez-Omil; J. M. Pintado; S. Helveg; P. L. Hansen

doi:10.1039/B211786J

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In situtransmission electron microscopy investigation of Ce(iv) and Pr(iv) reducibility in a Rh (1%)/Ce_0.8Pr_0.2O_2−xcatalyst

C. López-Cartes,^a S. Bernal,^a J. J. Calvino,*^a M. A. Cauqui,^a G. Blanco,^a J. A. Pérez-Omil,^a J. M. Pintado,^a S. Helveg^b and P. L. Hansen^b

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* Corresponding authors

^a Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Universidad de Cádiz, Apdo 40 Puerto Real, Cádiz, Spain
E-mail: jose.calvino@uca.es
Fax: 34 956 01 6288
Tel: 34 956 01 6333

^b Haldor Topsøe A/S, Nymøllevej 55, Lyngby, Denmark
E-mail: plh@topsoe.dk

Abstract

In-situ Atomic Resolution Transmission Electron Microscopy studies carried out on a Rh/Ce_0.8Pr_0,2O_2−x catalyst, under hydrogen in the temperature range 298–1223 K, show the occurrence of consecutive reduction of Pr⁴⁺ and Ce⁴⁺ ions, and the formation of an oxygen-deficient Ln₁₆O₃₀ (Ln: Ce, Pr) ordered phase.

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Article information

DOI: https://doi.org/10.1039/B211786J
Article type: Communication
Submitted: 26 Nov 2002
Accepted: 28 Jan 2003
First published: 10 Feb 2003

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Chem. Commun., 2003, 644-645

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In situ transmission electron microscopy investigation of Ce(IV) and Pr(IV) reducibility in a Rh (1%)/Ce_0.8Pr_0.2O_2−x catalyst

C. López-Cartes, S. Bernal, J. J. Calvino, M. A. Cauqui, G. Blanco, J. A. Pérez-Omil, J. M. Pintado, S. Helveg and P. L. Hansen, Chem. Commun., 2003, 644 DOI: 10.1039/B211786J

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