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 124
... platinum - rhenium bonds are present in the surface . In the infrared spectroscopy studies they observed that the stretching fre- quency of the chemisorbed carbon monoxide was higher on a Pt - Re / SiO2 catalyst than on a Pt / SiO2 catalyst ...
... platinum - rhenium bonds are present in the surface . In the infrared spectroscopy studies they observed that the stretching fre- quency of the chemisorbed carbon monoxide was higher on a Pt - Re / SiO2 catalyst than on a Pt / SiO2 catalyst ...
Page 146
... platinum - iridium catalyst was less than half of that on the platinum - rhenium catalyst ( 2.9 vs. 6.9 wt % on catalyst at the ends of the runs ) . In general , we observed that the rate of depo- sition of such residues on platinum - ...
... platinum - iridium catalyst was less than half of that on the platinum - rhenium catalyst ( 2.9 vs. 6.9 wt % on catalyst at the ends of the runs ) . In general , we observed that the rate of depo- sition of such residues on platinum - ...
Page 153
... platinum - rhenium catalyst alone . In the usual situation where the C5 + yield is greater for the platinum- rhenium catalyst than for the platinum - iridium catalyst , the debit in C5 + yield for the latter is substantially decreased ...
... platinum - rhenium catalyst alone . In the usual situation where the C5 + yield is greater for the platinum- rhenium catalyst than for the platinum - iridium catalyst , the debit in C5 + yield for the latter is substantially decreased ...
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