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 95
... line width by means of the Scherrer equation ( 46 ) . The lattice parameter of the platinum - iridium clusters is 3.875 Å , as determined from the positions of a number of lines in the diffraction pattern . This value corresponds to a ...
... line width by means of the Scherrer equation ( 46 ) . The lattice parameter of the platinum - iridium clusters is 3.875 Å , as determined from the positions of a number of lines in the diffraction pattern . This value corresponds to a ...
Page 97
... diffraction patterns do not reveal separate lines for platinum - rich and iridium - rich phases , despite the fact that the catalysts have been heated to only 500 ° C in their preparation . Instead , single diffraction lines are ...
... diffraction patterns do not reveal separate lines for platinum - rich and iridium - rich phases , despite the fact that the catalysts have been heated to only 500 ° C in their preparation . Instead , single diffraction lines are ...
Page 109
... lines observed in the X - ray diffraction pattern on the catalyst . Experimental evidence for the concentration of platinum in the surface has been obtained recently from studies on platinum - iridium films ( 51 ) . While the X - ray ...
... lines observed in the X - ray diffraction pattern on the catalyst . Experimental evidence for the concentration of platinum in the surface has been obtained recently from studies on platinum - iridium films ( 51 ) . While the X - ray ...
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