Artículo
Abstract:
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.
Registro:
| Documento: | Artículo |
| Título: | CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method |
| Autor: | Mariño, F.; Schönbrod, B.; Moreno, M.; Jobbágy, M.; Baronetti, G.; Laborde, M. |
| Filiación: | Laboratorio de Procesos Catalíticos, DIQ-FIUBA, Universidad de Buenos Aires, Pabellon Industrias, Ciudad Universitaria, 1428 Buenos Aires, Argentina INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon II, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina |
| Palabras clave: | Cerium; CO preferential oxidation; Copper; Hydrogen; PEM fuel cells; Carbon monoxide; Catalysts; Cerium; Oxidation; Proton exchange membrane fuel cells (PEMFC); Pyrolysis; Scanning electron microscopy; Urea; X ray diffraction; Preferential oxidation; Temperature range; Temperature-programmed reduction (TPR); Copper oxides |
| Año: | 2008 |
| Volumen: | 133-135 |
| Número: | 1-4 |
| Página de inicio: | 735 |
| Página de fin: | 742 |
| DOI: | http://dx.doi.org/10.1016/j.cattod.2007.12.019 |
| Título revista: | Catalysis Today |
| Título revista abreviado: | Catal Today |
| ISSN: | 09205861 |
| CODEN: | CATTE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v133-135_n1-4_p735_Marino |
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Citas:
---------- APA ----------
Mariño, F., Schönbrod, B., Moreno, M., Jobbágy, M., Baronetti, G. & Laborde, M. (2008) . CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method. Catalysis Today, 133-135(1-4), 735-742.http://dx.doi.org/10.1016/j.cattod.2007.12.019
---------- CHICAGO ----------
Mariño, F., Schönbrod, B., Moreno, M., Jobbágy, M., Baronetti, G., Laborde, M. "CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method" . Catalysis Today 133-135, no. 1-4 (2008) : 735-742.http://dx.doi.org/10.1016/j.cattod.2007.12.019
---------- MLA ----------
Mariño, F., Schönbrod, B., Moreno, M., Jobbágy, M., Baronetti, G., Laborde, M. "CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method" . Catalysis Today, vol. 133-135, no. 1-4, 2008, pp. 735-742.http://dx.doi.org/10.1016/j.cattod.2007.12.019
---------- VANCOUVER ----------
Mariño, F., Schönbrod, B., Moreno, M., Jobbágy, M., Baronetti, G., Laborde, M. CO preferential oxidation over CuO-CeO2 catalysts synthesized by the urea thermal decomposition method. Catal Today. 2008;133-135(1-4):735-742.http://dx.doi.org/10.1016/j.cattod.2007.12.019
