Influence of modifying additives on the electronic state of supported palladium

A. N. Pestryakov, V. V. Lunin, S. Fuentes, N. Bogdanchikova, A. Barrera

Research School of Chemistry & Applied Biomedical Sciences

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Abstract

The influence of modifying additives of Ce, Zr, La and Cs oxides on the electronic state of palladium supported on γ-Al₂O₃ has been studied by IR-spectroscopy of adsorbed CO, diffuse reflectance UV-visible spectroscopy, X-ray diffraction (XRD) and H₂ chemisorption. The modified supports have been prepared using impregnation, coprecipitation and sol-gel methods. It is established that Ce and Zr oxide additives increase the effective charge of palladium ions whereas La and Cs oxides lower it. The effect of metal-support interaction is stronger in samples prepared by sol-gel than by coprecipitation

Original language	English
Pages (from-to)	102-108
Number of pages	7
Journal	Chemical Physics Letters
Volume	367
Issue number	1-2
DOIs	https://doi.org/10.1016/S0009-2614(02)01682-2
Publication status	Published - 2 Jan 2003

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Spectroscopy
Atomic and Molecular Physics, and Optics

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AU - Pestryakov, A. N.

AU - Lunin, V. V.

AU - Fuentes, S.

AU - Bogdanchikova, N.

AU - Barrera, A.

PY - 2003/1/2

Y1 - 2003/1/2

N2 - The influence of modifying additives of Ce, Zr, La and Cs oxides on the electronic state of palladium supported on γ-Al2O3 has been studied by IR-spectroscopy of adsorbed CO, diffuse reflectance UV-visible spectroscopy, X-ray diffraction (XRD) and H2 chemisorption. The modified supports have been prepared using impregnation, coprecipitation and sol-gel methods. It is established that Ce and Zr oxide additives increase the effective charge of palladium ions whereas La and Cs oxides lower it. The effect of metal-support interaction is stronger in samples prepared by sol-gel than by coprecipitation

AB - The influence of modifying additives of Ce, Zr, La and Cs oxides on the electronic state of palladium supported on γ-Al2O3 has been studied by IR-spectroscopy of adsorbed CO, diffuse reflectance UV-visible spectroscopy, X-ray diffraction (XRD) and H2 chemisorption. The modified supports have been prepared using impregnation, coprecipitation and sol-gel methods. It is established that Ce and Zr oxide additives increase the effective charge of palladium ions whereas La and Cs oxides lower it. The effect of metal-support interaction is stronger in samples prepared by sol-gel than by coprecipitation

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Influence of modifying additives on the electronic state of supported palladium

Abstract

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