Abstract:
The urea method is explored for a high-yield preparation of CuO-CeO 2 catalysts precursors. Solutions containing urea, Ce(NO 3)3, and Cu(NO3)3 were aged at 363 K for 5 h, achieving a quantitative coprecipitation in the form of amorphous Cu(II)-Ce(III) basic carbonates, with Cu(II) contents up to 40%. The mixed precursors were characterized by PXRD, SEM, EDS, FTIR, and TG. Upon mild thermal treatment under air atmosphere, i.e., T = 723 K, powders were readily converted into CuO-promoted nanometric ceria. No Tenorite (CuO) segregation is observed after annealing at 873 K. The binary oxides were characterized by means of temperature-programmed reduction (TPR) and a test reaction for the preferential oxidation of carbon monoxide (CO-PROX), achieving the best performance with samples containing around 20% in copper atoms. © 2006 American Chemical Society.
Registro:
Documento: |
Artículo
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Título: | Synthesis of copper-promoted CeO2 catalysts |
Autor: | Jobbágy, M.; Mariño, F.; Schönbrod, B.; Baronetti, G.; Laborde, M. |
Filiación: | INQUIMAE, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, C1428EHA - Buenos Aires, Argentina Laboratorio de Procesos Cataliticos, Facultad de Ingeniería, Ciudad Universitaria, C1428EHA - Buenos Aires, Argentina
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Palabras clave: | Carbonates; Copper oxides; Heat treatment; Scanning electron microscopy; Solutions; Binary oxides; Coprecipitation; Temperature-programmed reduction (TPR); Cerium compounds |
Año: | 2006
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Volumen: | 18
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Número: | 7
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Página de inicio: | 1945
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Página de fin: | 1950
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DOI: |
http://dx.doi.org/10.1021/cm052437h |
Título revista: | Chemistry of Materials
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Título revista abreviado: | Chem. Mater.
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ISSN: | 08974756
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CODEN: | CMATE
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08974756_v18_n7_p1945_Jobbagy |
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Citas:
---------- APA ----------
Jobbágy, M., Mariño, F., Schönbrod, B., Baronetti, G. & Laborde, M.
(2006)
. Synthesis of copper-promoted CeO2 catalysts. Chemistry of Materials, 18(7), 1945-1950.
http://dx.doi.org/10.1021/cm052437h---------- CHICAGO ----------
Jobbágy, M., Mariño, F., Schönbrod, B., Baronetti, G., Laborde, M.
"Synthesis of copper-promoted CeO2 catalysts"
. Chemistry of Materials 18, no. 7
(2006) : 1945-1950.
http://dx.doi.org/10.1021/cm052437h---------- MLA ----------
Jobbágy, M., Mariño, F., Schönbrod, B., Baronetti, G., Laborde, M.
"Synthesis of copper-promoted CeO2 catalysts"
. Chemistry of Materials, vol. 18, no. 7, 2006, pp. 1945-1950.
http://dx.doi.org/10.1021/cm052437h---------- VANCOUVER ----------
Jobbágy, M., Mariño, F., Schönbrod, B., Baronetti, G., Laborde, M. Synthesis of copper-promoted CeO2 catalysts. Chem. Mater. 2006;18(7):1945-1950.
http://dx.doi.org/10.1021/cm052437h