Abstract
The effect of the pre-treatment temperature and atmosphere on the surface composition and on the activity and stability of well defined Au/CeO2 catalysts in the low-temperature water-gas shift reaction in dilute water gas was investigated by X-ray photoelectron spectroscopy, kinetic measurements and in-situ IR spectroscopic (DRIFTS) measurements, comparing different reductive and oxidative conditioning procedures. Reductive conditioning at 200 °C yields the most active catalyst. Physical origin and consequences of the resulting differences in the reaction behavior are discussed.
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We gratefully acknowledge financial support by the Deutsche Forschungsgemeinschaft, via Research Training Group 328 (“Molecular Organization and Dynamics at Interfaces and Surfaces”) and via project Be 1201/9-4.
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Karpenko, A., Denkwitz, Y., Plzak, V. et al. Low-temperature water-gas shift reaction on Au/CeO2 catalysts – the influence of catalyst pre-treatment on the activity and deactivation in idealized reformate. Catal Lett 116, 105–115 (2007). https://doi.org/10.1007/s10562-007-9111-z
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DOI: https://doi.org/10.1007/s10562-007-9111-z