Abstract
A series of oxidised copper-ceria catalysts with varying copper loadings and prepared by two different methods (impregnation of ceria and coprecipitation of the two components within reverse microemulsions) have been examined with the aim of determining the nature of active entities for the two main (CO and H2) competing oxidation reactions that take place during preferential oxidation of CO in H2-rich streams over this type of catalysts. The analysis is mainly based on operando spectroscopic exploration by DRIFTS and XANES as well as in situ analysis by Raman. The results allow establishing a model of the catalytic behaviour of this type of catalysts which can provide keys to control their CO-PROX catalytic properties.
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Acknowledgements
D.G. and A.H. thank the Ministerio de Educación y Ciencia (MEC) for a FPI and FPU PhD grants, respectively. The help provided by Dr. S.G. Fiddy at SRS station 7.1 (project # 44072) during recording of XANES spectra is greatly acknowledged. Thanks are due to the MEC (project CTQ2006-15600/BQU) and Comunidad de Madrid (project ENERCAM S-0505/ENE/000304) for financial support.
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Martínez-Arias, A., Gamarra, D., Fernández-García, M. et al. Spectroscopic Study on the Nature of Active Entities in Copper–Ceria CO-PROX Catalysts. Top Catal 52, 1425–1432 (2009). https://doi.org/10.1007/s11244-009-9322-1
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DOI: https://doi.org/10.1007/s11244-009-9322-1