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correlated to new active sites created in the metal-support interfacial region for metal supported catalysts [ 7 ] and to both reducibility and surface acid–base properties for bulk metal oxide catalysts [ 9 ]. The role of the metal and acid–base properties

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. Recycling of the MCM-41 supported catalyst Easy recyclability and the prolonged retention of catalytic activity are very important for industrial applications. In order to test the reusability, we carried out the coupling of iodobenzene or 1-iodo-3

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acid strength of the supported catalyst was increased with an increasing loading amount of TPA from 5 up to 10 wt% and is constant for higher loading amounts. These results confirm maximum dispersion of TPA on the MCM-41 for the 10 wt% catalyst which is

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/Al = 2.43) were obtained from Nankai University catalyst Co., Ltd. The supported catalysts were prepared by impregnating the NaY zeolite with an appropriate amount of the aqueous solution of KNO 3 for 12 h. The obtained mixture was dried in an oven at

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the alumina-supported catalysts. But BET and XRF characterizations revealed that vanadium element does exist in the catalysts. It is a clear indication that V 2 O 5 phase is in a highly dispersed state [ 27 ]. XPS analysis

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explained as follows. During the preparation of the supported catalyst, tungstic acid, H 2 O 2 and H 3 PO 4 were first mixed according to the ratio in the literature [ 4 ] in order to get the active species of [(PO 4 ){WO(O 2 ) 2 } 4 ] 3− . Second, the

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]. However, the alumina supported catalyst for dehydrogenation may suffer from its acidity. It is generally accepted that the side reactions of the alkane dehydrogenation such as isomerization and catalytic cracking may occur on the acid sites. If there are

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inactive to the adsorption and dissociation of hydrogen molecule). This phenomenon is called hydrogen spillover effect [ 2 ]. It was reported that hydrogen spillover happened in some metal supported catalyst, such as Ni, Ru, Rh, Pd, Pt and so on

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conditions were as follows: H 2 O 2 in concentration of 8.8 mM, ARS in concentration of 300 μM and 1 mg supported catalyst in 2 mL final volume in the cuvette. Results and discussion Thermal analysis

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Reaction Kinetics, Mechanisms and Catalysis
Authors: Viorel Chihaia, Karl Sohlberg, B. Grzybowska-Świerkosz, M. Ruszel, R. Grabowski, L. Kępiński, M. A. Małecka, and J. Sobczak

are much more active in the CO oxidation than the Au/inert oxides systems. These facts suggest that reducibility of the support may be another factor influencing catalytic behavior of the Au/oxide support catalysts. It can be supposed that oxides of

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