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- W1978176237 abstract "Two series of platinum-ruthenium catalysts deposited on γ-Al2O3 pellets and equivalent to 2 wt% Pt in number of (Pt + Ru) atoms were investigated. The first series (I) was prepared by successive impregnation of H2RuCl6 and of H2PtCl6 in water, and the second (II) by coimpregnation of H2PtCl6 and of H2RuCl6 in ethanol (75%) plus water. The chemisorption (O2, H2) and titration (mainly hydrogen temperature-programmed titration of chemisorbed oxygen) data showed catalysts (I) to be composed of mixtures of Pt and Ru particles, and catalysts (II) to be composed of alloy particles. This conclusion was on the whole corroborated by single particle X-ray emission analysis using X-ray emission in a scanning transmission electron microscope. This last technique further showed that the platinum particles in catalysts (I) contained a small amount of Ru. The reasons for the difference of state of the metallic particles in catalysts (I) and (II) are not totally elucidated but a tentative interpretation is given." @default.
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- W1978176237 date "1981-07-01" @default.
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- W1978176237 title "Hydrogen titration, scanning electron microscopy, and associated X-ray emission studies of Pt$z.sbnd;Ru/Al2O3 catalysts" @default.
- W1978176237 cites W1977158615 @default.
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- W1978176237 doi "https://doi.org/10.1016/0021-9517(81)90326-2" @default.
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