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- W2040904781 abstract "Silica- and silica-alumina-supported Ni catalysts have been prepared by wet impregnation, and their activities determined for the isomerisation and hydrogenolysis of n-hexane, for the hydrogenation of benzene, and for the COH2 reaction. The results show that the NiSiAl catalysts have normal activities for the hydrogenation of benzene and for the COH2 reaction, but that their activity for the hydrogenolysis of hexane is much lower than that of an equivalent silica-supported catalyst. Possible reasons for the suppression of hydrogenolysis activity overNiSiAl catalysts are considered. Contamination of the metal surface by sulphur from the support is excluded for a number of reasons. It is concluded that due to the influence of the support the Ni particles are modified either electronically or structurally. Comparison with Ni/titania catalysts shows that it is possible by varying the support to prepare Ni catalysts having normal activities for the hydrogenation of benzene which, on the one hand, have unusually low activities for hydrogenolysis reactions (NiSiAl), or, on the other hand, have unusually high activities for the COH2 reaction (NiTi). It is suggested that for catalysts where a metal-support interaction may operate, the use of benzene activity data rather than hydrogen chemisorption data may offer a more reliable method of determining specific activities, and hence of determining the extent of metal-support effects." @default.
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- W2040904781 date "1984-01-01" @default.
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- W2040904781 title "Support effects in nickel catalysts" @default.
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- W2040904781 doi "https://doi.org/10.1016/0021-9517(84)90105-2" @default.
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