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- W1967595596 abstract "An e.s.r investigation of Ru/ZrO2 has shown that Ru centres are present in different oxidation states, two of which are paramagnetic: RuIII and RuI. The assignment of the electronic configuration follows from the results of the interaction of Ru/ZrO2 with CO, for the identification of RuIII and RuI, and with NO for the identification of RuII. Magnetic tensor components allow recognition of an RuIII–CO adduct (g∥= 2.039, g⊥= 2.003) and an RuI–CO adduct (g= 2.05) An RuII–NO species was also identified [g⊥= 2.00, g∥= 1.91,A⊥(N)=40 G]. The results of the interaction with O2 also have been discussed in order to give a fuller description of the electronic configuration of the surface ruthenium centres and of the interaction effects between metal and support centres. It appears that at the Ru–ZrO2 interface occurs an interaction stronger than in the Ru–γ-Al2O3 case, the strength depending also on the temperature of the pyrolysis used to obtain Ru/ZrO2 from the Ru3(CO)12/ZrO2 metal precursor. Also the analogous Rh/ZrO2 system was considered with respect to interaction with NO in order to compare the variation in the metal–support interaction owing to differences in the supported metal." @default.
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- W1967595596 date "1989-01-01" @default.
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- W1967595596 title "Electron spin resonance investigation of ZrO2-supported ruthenium. Evidence of strong metal–support interaction" @default.
- W1967595596 doi "https://doi.org/10.1039/f19898500801" @default.
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