1. Effect of gallia doping on the acid–base and redox properties of ceria
- Author
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Collins, Sebastián, Finos, Gisela, Alcántara, Rodrigo, del Rio, Eloy, Bernal, Serafín, and Bonivardi, Adrian
- Subjects
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CERIUM oxides , *OXIDATION-reduction reaction , *GALLIUM , *SALTWATER solutions , *MOLECULAR structure , *RAMAN spectroscopy , *CATALYSIS , *INORGANIC synthesis - Abstract
Abstract: This work presents the synthesis and characterization of cerium oxide doped with gallium, which were prepared by co-precipitation in basic aqueous solution followed by calcination at 773K. XRD and Raman spectroscopy suggested that Ga(III) cations were incorporated into the ceria crystal structure. Moreover, surface Ga-H species were detected by FTIR with a 100cm−1 downshift of the ν(Ga-H) peak, which indicated that Ga(III) were incorporated onto the surface lattice of the ceria. Results of CO2 and CO chemisoption, as well as, TPR-H2 and TPR-CO, showed that the acid–base (decreased basicity) and redox (enhanced reducibility) properties of the gallium-doped ceria materials were modified as compared with the pure cerium dioxide. The catalytic oxidation of CO was investigated over the oxides. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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