Bi-Component Redox Systems Obtained from Iridium or Rhodium Chlorides and Molybdophosphoric Heteropoly Acid
Reaction Kinetics, Mechanisms and Catalysis
, E-ISSN: 1878-5204
||Benzene, Catalysis, Ir(III) and Rh(III) complexes, Molybdophosphoric heteropoly acid, Oxidation
Kuznetsova Lidia I.
Koscheev Sergei V.
Kuznetsova Nina I.
Detusheva Ludmila G.
Boreskov Institute of Catalysis SB RAS
An XP, IR and UV–VIS spectroscopy study was carried out to characterize the compositions of molybdophosphate heteropoly anions with Ir(III) or Rh(III) hydroxo–chloro complexes, such as Ir1.1Cl2.4O x H y ·(PMo12O40)·16.0 H2O, where x is the number of oxygen atoms in the coordination sphere of iridium, and also mixed-valent species containing partially reduced and dehydrated heteropoly acid of suggested composition (Ir0, IrIII) n Cl m O x H y (PMo 12−p VIMo p VO40−p/2) (on the average, n ≈ 1, m < 1, p ≥ 4). The mixed-valent Ir containing species showed stable activity in the gas-phase oxidation of benzene by O2–H2 mixture.