Reaction Kinetics, Mechanisms and Catalysis
Volume/Issue:
Volume 105: Issue 1
Au/MCr2O4 (M = Co, Mn, Fe) catalysts in the oxidations of CO, C2, and C3 hydrocarbons
Authors:
Viorel Chihaia
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Karl Sohlberg
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B. Grzybowska-Świerkosz Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239, Krakow, Poland

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M. Ruszel Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239, Krakow, Poland

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R. Grabowski Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239, Krakow, Poland

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L. Kępiński Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422, Wrocław, Poland

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M. A. Małecka Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okólna 2, 50-422, Wrocław, Poland

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J. Sobczak Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224, Warszawa, Poland

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Pages:
69–78
Online Publication Date:
28 Sep 2011
Publication Date:
01 Feb 2012
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s11144-011-0377-1
Keywords:
Au/CoCr2O4; Au/MnCr2O4; Au/FeCr2O4 catalysts; Oxidation of CO; Ethane; Propane; Propene; Reducibility; Particle size effect
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Abstract

Au/MIICr2O4 (MII = Co, Mn, Fe) catalysts have been tested in the total oxidation of ethane, propane, propene at 300 °C and of CO at 35 °C, and characterized by TEM, XPS and hydrogen thermo-programmed reduction (H2TPR). The catalytic activity has been found to depend on the nature of the oxidized compound. For the CO and ethane oxidation, the activity decreases in the sequence Au/CoCr2O4 > Au/MnCr2O4 ≫ Au/FeCr2O4 and follows the sequence of the decreasing reducibility of the supports and the catalysts, estimated from H2TPR measurements. The activity decreases with the increasing Au particle size in the same order, the reactions then seem structure sensitive. No correlations between the activity and reducibility or the particle size are observed for oxidation of the C3 hydrocarbons: the sequence of the activity for propane is: Au/FeCr2O4 > Au/CoCr2O4 > Au/MnCr2O4, whereas activity in propene oxidation does not change markedly within the studied catalysts. The reaction mechanism in the oxidation of propane and propene seems then to be different from that of oxidation of CO and ethane.

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Cover Reaction Kinetics, Mechanisms and Catalysis
Reaction Kinetics, Mechanisms and Catalysis
Print ISSN:
1878-5190
Online ISSN:
1878-5204

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation		 1974
Volumes
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Issues
per Year		 6
Founder Akadémiai Kiadó
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Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
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Springer Nature Switzerland AG
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ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)

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