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- W1856035650 abstract "The bimetallic flame spray-synthesized AuPd/TiO2 catalysts (Au:Pd weight ratio 1:1) were reduced for 2 h under H2 at two different temperatures (40 °C and 500 °C) and tested in the liquid phase selective hydrogenation of 1-heptyne under mild conditions (30 °C and 4 bar H2). Based on TEM-EDX analysis of individual nanoparticles, reduction at 500 °C tends to homogenize the composition of the individual AuPd nanoparticles without significant changes of their average particle size and bulk composition. Higher reaction rate (245 μmol s−1 g cat.−1) was obtained on the AuPd/TiO2 R40 than on the AuPd/TiO2 R500 (223 μmol s−1 g cat.−1). Upon reduction at 500 °C, the bimetallic AuPd/TiO2 exhibited a similar degree of the strong-metal support interaction (SMSI) effect as the monometallic one. As revealed by XPS results, the ratios of Pd/Ti on both catalysts decreased by ca. 23%, due probably to the migration of TiOx species onto the metals. The highest yield of 1-heptene (∼93%) was obtained over the bimetallic AuPd/TiO2 reduced at 40 °C in 20 min reaction time under the reaction conditions used. The high temperature reduction is unnecessary for the improvement of catalyst performances when using supported bimetallic AuPd catalysts." @default.
- W1856035650 created "2016-06-24" @default.
- W1856035650 creator A5004136225 @default.
- W1856035650 creator A5031527730 @default.
- W1856035650 creator A5034707064 @default.
- W1856035650 creator A5035104011 @default.
- W1856035650 creator A5066855766 @default.
- W1856035650 creator A5072099035 @default.
- W1856035650 date "2015-10-01" @default.
- W1856035650 modified "2023-10-16" @default.
- W1856035650 title "Effect of reduction temperature on the characteristics and catalytic properties of TiO2 supported AuPd alloy particles prepared by one-step flame spray pyrolysis in the selective hydrogenation of 1-heptyne" @default.
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