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Preferential CO oxidation in hydrogen-rich gases over Ag catalysts supported on different supports

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Abstract

The monometallic silver supported on SiO2, Al2O3, ZSM-5 (Si:Al = 100) and bi-metallic AgCe/SiO2 samples were studied in the reaction of the preferential CO oxidation. It was established that the supported silver catalysts are promising systems for selective oxidation of CO at low temperatures and the addition of cerium oxide increases the catalytic activity and selectivity most probably because of the increase in the silver dispersion; the homogeneous distribution of Ag and ceria on the silica support; formation of Agnδ+ clusters; increase in bulk and subsurface oxygen.

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Acknowledgements

This work was supported by the Bulgarian Ministry of Education and Science under the National Research Program E+: Low Carbon Energy for the Transport and Households, Grant Agreement D01-214/2018. Research equipment of distributed research infrastructure INFRAMAT DO1- 382/18.12.2020 (part of Bulgarian National Roadmap for research infrastructures) supported by Bulgarian Ministry of Education and Science was used in this investigation.

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Authors and Affiliations

  1. Institute of Catalysis, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Block 11, 1113, Sofia, Bulgaria

    S. Todorova, H. Kolev, Y. Karakirova, D. Filkova, B. Grahovski, K. Aleksieva & G. Kadinov

  2. Instituto de Ciencia de Materiales and Dpto. Química Inorgánica, CSIC-University of Sevilla, Sevilla, Spain

    J. P. Holgado & A. Caballero

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  1. S. Todorova
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  2. H. Kolev
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Correspondence to S. Todorova.

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Todorova, S., Kolev, H., Karakirova, Y. et al. Preferential CO oxidation in hydrogen-rich gases over Ag catalysts supported on different supports. Reac Kinet Mech Cat 135, 1405–1422 (2022). https://doi.org/10.1007/s11144-022-02158-1

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