Surface State and Catalytic Performance of Ceria‐Supported Cobalt Catalysts in the Steam Reforming of Ethanol
The effect of the particle size and the addition of a K promoter on the oxidation state of Co/CeO2 was investigated and correlated with selectivity for ethanol steam reforming performed with various H2O/EtOH molar ratios. Spectroscopic studies showed that the oxidation state of the catalyst componen...
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Veröffentlicht in: | ChemCatChem 2017-03, Vol.9 (5), p.782-797 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The effect of the particle size and the addition of a K promoter on the oxidation state of Co/CeO2 was investigated and correlated with selectivity for ethanol steam reforming performed with various H2O/EtOH molar ratios. Spectroscopic studies showed that the oxidation state of the catalyst components depends on the H2O/EtOH molar ratio. Surface oxygen‐containing species (OH and Kδ+−Oδ−) are necessary to achieve a good catalyst selectivity, to decrease the amount of coke deposited and to change the nature of the product from fully dehydrogenated C=C to CHx. Besides the surface concentration of oxygen‐containing species, the catalyst morphology and the location at which oxygen‐containing species are chemisorbed may be equally important to their abundance; the selective ceria‐supported Co catalyst should have well‐dispersed Co particles deposited on a well‐dispersed support.
They deserve a promotion! The effect of the particle size and the addition of a K promoter on the oxidation state of Co/CeO2 is investigated and correlated with selectivity for ethanol steam reforming performed with various H2O/EtOH molar ratios. Spectroscopic studies show that the oxidation state of the catalyst components depends on the H2O/EtOH molar ratio. |
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ISSN: | 1867-3880 1867-3899 |
DOI: | 10.1002/cctc.201601343 |