CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method

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CuO-CeO2 catalyst precursors were synthesized by the homogeneous thermal decomposition of urea. Catalysts containing different Cu/Ce ratios were obtained by calcinating the precursors at 450 °C and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX) and temperature-progr...

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Autor principal: Mariño, F.
Otros Autores: Schönbrod, B., Moreno, M., Jobbágy, M., Baronetti, G., Laborde, M.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2008
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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030 |a CATTE 
100 1 |a Mariño, F. 
245 1 0 |a CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method 
260 |c 2008 
270 1 0 |m Mariño, F.; Laboratorio de Procesos Catalíticos, DIQ-FIUBA, Universidad de Buenos Aires, Pabellon Industrias, Ciudad Universitaria, 1428 Buenos Aires, Argentina; email: fernando@di.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a CuO-CeO2 catalyst precursors were synthesized by the homogeneous thermal decomposition of urea. Catalysts containing different Cu/Ce ratios were obtained by calcinating the precursors at 450 °C and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM-EDX) and temperature-programmed reduction (TPR) measurements. Catalytic tests were performed in the temperature range 100-300 °C to evaluate the activity, selectivity and stability of these samples for the preferential oxidation of CO (CO PROX) reaction. The effect of the presence of H2O and/or CO2 in the feed stream on both the structure and the catalytic behaviour of the samples were also analysed. The catalytic activity of the samples for both CO and H2 oxidation reactions increases as the copper loading increases and H2 oxidation competition becomes more important when the available oxygen in the gas phase is scarce. During the first 24 h of CO PROX operation, catalysts with low copper content are perfectly stable but the sample with the highest copper content has shown an irreversible deactivation, probably due to a partial reduction of the segregated CuO phase present in the fresh sample. The presence of both water and carbon dioxide in the feed gas stream has a negative effect on the catalytic activity of CuO-CeO2 catalysts. © 2007 Elsevier B.V. All rights reserved.  |l eng 
536 |a Detalles de la financiación: Universidad de Buenos Aires 
536 |a Detalles de la financiación: Secretaria de Ciencia y Tecnica, Universidad de Buenos Aires 
536 |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas 
536 |a Detalles de la financiación: To Mr. Roberto Tejeda for the TPR measurements. To the University of Buenos Aires (UBA), SECyT, ANPCyT and CONICET for their financial support. 
593 |a Laboratorio de Procesos Catalíticos, DIQ-FIUBA, Universidad de Buenos Aires, Pabellon Industrias, Ciudad Universitaria, 1428 Buenos Aires, Argentina 
593 |a INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina 
690 1 0 |a CERIUM 
690 1 0 |a CO PREFERENTIAL OXIDATION 
690 1 0 |a COPPER 
690 1 0 |a HYDROGEN 
690 1 0 |a PEM FUEL CELLS 
690 1 0 |a CARBON MONOXIDE 
690 1 0 |a CATALYSTS 
690 1 0 |a CERIUM 
690 1 0 |a OXIDATION 
690 1 0 |a PROTON EXCHANGE MEMBRANE FUEL CELLS (PEMFC) 
690 1 0 |a PYROLYSIS 
690 1 0 |a SCANNING ELECTRON MICROSCOPY 
690 1 0 |a UREA 
690 1 0 |a X RAY DIFFRACTION 
690 1 0 |a PREFERENTIAL OXIDATION 
690 1 0 |a TEMPERATURE RANGE 
690 1 0 |a TEMPERATURE-PROGRAMMED REDUCTION (TPR) 
690 1 0 |a COPPER OXIDES 
700 1 |a Schönbrod, B. 
700 1 |a Moreno, M. 
700 1 |a Jobbágy, M. 
700 1 |a Baronetti, G. 
700 1 |a Laborde, M. 
773 0 |d 2008  |g v. 133-135  |h pp. 735-742  |k n. 1-4  |p Catal Today  |x 09205861  |w (AR-BaUEN)CENRE-4117  |t Catalysis Today 
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856 4 0 |u https://doi.org/10.1016/j.cattod.2007.12.019  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_09205861_v133-135_n1-4_p735_Marino  |y Handle 
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