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Issue 16, 2000
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NO reduction, CO and hydrocarbon oxidation over combustion synthesized Ag/CeO2 catalyst

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Abstract

The combustion technique produces ionically dispersed Ag on a nano-crystalline CeO2 surface. The catalysts thus produced were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. Catalytic properties towards NO reduction, CO and hydrocarbon oxidation have been investigated using the temperature programmed reaction technique in a packed bed tubular reactor. These results are compared with α-Al2O3 supported finely divided Ag metal particles synthesized by the same method. Both oxidation and reduction reactions over Ag/CeO2 have been observed to occur at lower temperatures compared to Ag/Al2O3. The rate and turnover frequency of the NO+CO reaction over 1% Ag/CeO2 are 56.3 μmol g−1 s−1 and 0.97 s−1 at 225°C respectively. Activation energy (Ea) values are 71 and 67 kJ mol−1 for CO+O2 and NO+CO reactions, respectively, over 1% Ag/CeO2 catalyst.

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Publication details

The article was received on 16 May 2000, accepted on 20 Jun 2000 and first published on 26 Jul 2000


Article type: Paper
DOI: 10.1039/B003908J
Citation: Phys. Chem. Chem. Phys., 2000,2, 3715-3719
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    NO reduction, CO and hydrocarbon oxidation over combustion synthesized Ag/CeO2 catalyst

    P. Bera, K. C. Patil and M. S. Hegde, Phys. Chem. Chem. Phys., 2000, 2, 3715
    DOI: 10.1039/B003908J

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