Bimetallic Catalysts: Discoveries, Concepts, and ApplicationsPresents an account of the research on bimetallic catalysts. Focuses attention on the possibility of influencing the selectivity of chemical transformations on metal surfaces and preparing metal alloys in a highly dispersed state. Covers the validation and elucidation of the bimetallic cluster concept. Includes figures and tables. |
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Page 18
... Reactions In comparison with alkane hydrogenolysis reactions , hydrogenation and de- hydrogenation reactions of hydrocarbons on metals exhibit a much smaller range of variation in rate ( per unit surface area or per surface atom ) from ...
... Reactions In comparison with alkane hydrogenolysis reactions , hydrogenation and de- hydrogenation reactions of hydrocarbons on metals exhibit a much smaller range of variation in rate ( per unit surface area or per surface atom ) from ...
Page 132
... reactions . The hydrogen inhibits the forma- tion of highly unsaturated species on the surface and also removes hydrocar- bon residues via hydrogenolysis reactions ( 8-10 ) . Since increasing hydrogen pressure also has the effect of ...
... reactions . The hydrogen inhibits the forma- tion of highly unsaturated species on the surface and also removes hydrocar- bon residues via hydrogenolysis reactions ( 8-10 ) . Since increasing hydrogen pressure also has the effect of ...
Page 135
... reactions that proceed via olefin intermediates . Thermodynamics sets an upper limit on the attainable concentrations of such intermediates in the system . The equilibria for isomerization reactions are much less temperature sensi- tive ...
... reactions that proceed via olefin intermediates . Thermodynamics sets an upper limit on the attainable concentrations of such intermediates in the system . The equilibria for isomerization reactions are much less temperature sensi- tive ...
Common terms and phrases
absorber atom absorption edge absorption fine structure Academic Press adsorbed alkanes alloys alumina aromatic hydrocarbons atomic ratio atoms benzene bimetallic catalysts bimetallic clusters bulk calcined carbon monoxide cata Catal catalyst containing catalytic activity catalytic reforming Chem components composition coordination shell copper copper atoms copper EXAFS corresponding crystallites CuOs cycloalkanes cyclohexane decreases dehydrogenation electron energy EXAFS data fitting error Group IB metal Group VIII metal H₂ highly dispersed hydrogen chemisorption hydrogen partial pressure interatomic distance isomerization isotherm lower lysts methylcyclopentane Mössbauer Mössbauer effect n-heptane naphtha nearest neighbor nickel nickel-copper alloys obtained OsCu osmium osmium and copper osmium-copper catalyst parameters partial pressure permission from Academic phase shift functions Phys platinum and iridium platinum-iridium catalyst platinum-rhenium catalyst reactions reference catalyst Reprinted with permission rhenium room temperature ruthenium-copper aggregates ruthenium-copper catalyst sample shown in Figure silica silica-supported Sinfelt space velocity spectroscopy studies surface atoms tion values X-ray diffraction yields