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- W2073428680 abstract "The effect of support on the surface composition and structure of supported PtRu bimetallic clusters has been studied. Surface enrichment in Pt occurred for all of the catalysts studied. However, it occurred to a greater extent when the clusters were supported on alumina. Both metal dispersion and percentage total metal exposure were observed to increase significantly as a result of the clustering process. The internal structure of the PtRuSiO2 clusters consisted of a Ru-rich core surrounded by a Pt-rich outer shell consistent with the cherry model. PtRuAl2O3 clusters did not have this structure. The inner and outer metal shells were equilibrated in the case of the PtRuAl2O3 clusters, but not for the PtRuSiO2 clusters. The effect of O2 treatment resulted in a further Pt enrichment in the case of the PtRuSiO2 clusters but did not cause any structural changes in the PtRuAl2O3 clusters. Separate Pt and Ru particles did not form under any of the experimental conditions used in this study." @default.
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- W2073428680 date "1984-02-01" @default.
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- W2073428680 title "The surface composition and structure of supported Pt$z.sbnd;Ru bimetallic clusters" @default.
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- W2073428680 doi "https://doi.org/10.1016/0021-9517(84)90222-7" @default.
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