IR investigation of the interaction of deuterium with Ce0.6Zr0.4O2 and Cl-doped Ce0.6Zr0.4O2 |
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| Authors: | F.C. Gennari M. Graziani |
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| Affiliation: | Chemistry Department, INSTM, Trieste Research Unit and Center of Excellence for Nanostructured Materials, via L. Giorgieri 1, Trieste I-34127, Italy |
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| Abstract: | The interaction of deuterium with Ce0.6Zr0.4O2, synthesised by a co-precipitation technique, is discussed on the basis of the sample's bulk and surface composition and the presence of trace amounts of silicon. Redox cycling resulted in surface cerium enrichment, which, however, only moderately affected the interaction of the material with D2. Addition of a trace amount of chloride ion to the oxide surface promoted both H/D scrambling and vacancy creation. Chloride ion was also found to prevent the surface cerium enrichment induced by redox cycling. |
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| Keywords: | Ceria-zirconia-based materials Ceria reduction Heterogeneous catalyst Hydrogen activation Deuterium scrambling |
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