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catalysts for low-temperature CO oxidation. The supported catalysts are usually prepared by the two-step method [ 13 , 14 ]. First, the support is prepared by the sol–gel method or the co-precipitation method. Second, the active component such as Au or CuO

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Main characteristics of Pt, PtGe y and PtSn y supported catalysts Catalyst M′/Pt( y ) a

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-Rad, FTS 175C). A 5-mg, self-supported catalyst wafer was evacuated at 200 °C for 1 h. The 29 Si NMR spectra of the silicas were obtained using a solid state MAS NMR spectrometer (Varian, Unity Solid Inova WB 200 MHz System). The resonance frequency of 29

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Cleanio L. Lima, Hélvio S. A. de Sousa, Santiago J. S. Vasconcelos, Josué M. Filho, Alcemira C. Oliveira, Francisco F. de Sousa, and Alcineia C. Oliveira

was removed at 120–400 °C using a TG-DSC STA 449 instrument. For Py adsorption followed by IR measurements, about 100 mg of the self-supported catalysts was placed in a tubular cell and evacuated at 100 °C for 2 h. Subsequently, Py was adsorbed on the

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immobilized TiO 2 system may be less than that of the slurry system due to the reduced surface area accessible for photocatalytic reaction as well as low porosity of the supported catalyst layer [ 13 ], but the catalyst can be used for long-term applications

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, Paukshtis , EA , Kriger , TA , Khasin , AA , Parmon , VN 2005 Development of contactless methods for directly measuring the temperature of nanoparticles of the active component in operating supported catalysts . Kinet Catal 46 : 282 – 294 10.1007/s

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, Salvadori , P et al. 2007 Nanoscale Cu supported catalysts in the partial oxidation of cyclohexane with molecular oxygen . Catalysis Letters 116 1-2 57 – 62 10.1007/s10562-007-9092-y . Glänzel , W

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VIII elements [ 1 – 3 ]. But the complete sulfidation of the active phase is difficult for supported catalysts [ 4 , 5 ]. One alternative is to use precursors already sulfided like Ni(Co)-promoted ammonium thiometallates [(NR 4 ) 2 MeMe′S 4 , R: H or

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. 2000 . Water-gas shift reaction over sulfided molybdenum catalysts. I. Alumina, titania and zirconia-supported catalysts . Appl Catal A Gen . 196 : 293 – 303 10.1016/S0926-860X(99)00480-9 . 22

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