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- W2031528049 abstract "Two percent (Pt + Re)Al2O3 catalysts prepared by co-impregnation of Al2O3 with H2PtCl6 and Re2O7 and generally reduced by hydrogen at 500 °C were mainly investigated by thermogravimetry (H2O2 cycles at 25 °C), electron microscopy, and infrared spectroscopy (chemisorption of CO at 25 °C). The greater reducibility in the presence of Pt of oxygen chemisorbed by Re, and the vCO frequency shifts of the PtCO and ReCO species against the percentage of Re indicated a strong interaction between both metals. Most probably Pt and Re are alloyed. The H2O2 cycles at 25 °C allowed the determination of the overall dispersion of the (Pt + Re) phase while the optical density of the infrared band of CO adsorbed on platinum gave some information about the surface concentration of Pt in the (Pt + Re) phase." @default.
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- W2031528049 date "1976-11-01" @default.
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- W2031528049 title "Platinum-rhenium-alumina catalysts II. Study of the metallic phase after reduction" @default.
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- W2031528049 doi "https://doi.org/10.1016/0021-9517(76)90132-9" @default.
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