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- W2000267550 abstract "A series of catalysts consisting of small gold particles supported on cobalt oxide (Co3O4), were synthesized by co-precipitation and tested for their ability to oxidize dichloromethane (CH2C12). The addition of the small gold particles to the CO3O4 (which as the only catalyst has the highest activity for the oxidation of CH2C12 among the first row transition metal oxides) significantly improved the activity of the CO3O4. The rate constant at 300°C was increased by a factor of 25. The activity was essentially independent of the gold loading at gold loadings between 0.2 and 10.0 wt.-%. In addition to this, the Au/Co304 catalysts were also significantly more active than noble metal catalysts, and exhibited activities 10 times higher than Cr2O3/A12O3, 70 times higher than 0.5% Pt/A12O3, and 560 times higher than 0.5% Pd/A12O3 at 300°C. The Au/Co3O4 catalysts selectively oxidized CH2C12 to CO2 and HCl (which can readily be stripped from air by a basic solution), and were quite stable at 350°C in the presence of the oxidation products. In addition, water did not have an adverse effect on the catalytic activity. No detectable by-products (such as CHC13 or CCl4) or partial oxidation products (CO, C12, COC12 and HCHO) were observed at 350°C. The oxidation of CH2C12 was first order in CH2C12 concentration, with activation energies of ca. 20 kcal/mol." @default.
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- W2000267550 date "1996-06-01" @default.
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- W2000267550 title "Gold/cobalt oxide catalysts for oxidative destruction of dichloromethane" @default.
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- W2000267550 doi "https://doi.org/10.1016/0920-5861(95)00337-1" @default.
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