NO reduction, CO and hydrocarbon oxidation over combustion synthesized {Ag/CeO_2} catalyst

Bera, Parthasarathi and Patilb, KC and Hegde, MS (2000) NO reduction, CO and hydrocarbon oxidation over combustion synthesized {Ag/CeO_2} catalyst. In: Physical chemistry chemical physics, 02 (16). pp. 3715-3719.

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Abstract

The combustion technique produces ionically dispersed Ag on a nano-crystalline {CeO_2} 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 \alpha-{Al_2O_3} supported finely divided Ag metal particles synthesized by the same method. Both oxidation and reduction reactions over {Ag/CeO_2} have been observed to occur at lower temperatures compared to {Ag/Al_2O_3}. The rate and turnover frequency of the NO+CO reaction over 1% {Ag/CeO_2} are 56.3 \mu mol {g^-1 s^-1} and {0.97 s^-1} at {225^0}C respectively. Activation energy {(E_a)} values are 71 and 67 kJ {mol^-1} for {CO+O_2} and NO+CO reactions, respectively, over 1% {Ag/CeO_2} catalyst.

Item Type:	Journal Article
Publication:	Physical chemistry chemical physics
Publisher:	Royal Society of Chemistry
Additional Information:	Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	03 Nov 2009 10:15
Last Modified:	19 Sep 2010 05:00
URI:	http://eprints.iisc.ac.in/id/eprint/18084

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