In situ Mössbauer spectroscopic study on cobalt and iron molybdates and their mixtures with Bi2(MoO4)3 during propene mild oxidation |
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| Authors: | B Benaichouba P Bussiere J C Vedrine |
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| Institution: | (1) Institut de Recherches sur la Catalyse, CNRS, conventionné avec l'Université Claude Bernard, Lyon 1, 69626 Villeurbanne, Cédex, France;(2) Present address: ENS de Mostaganem, BP227, 27000 Mostaganem, Algérie |
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| Abstract: | Several Co and Fe and mixed Co, Fe molydates have been studied by Mössbauer spectroscopy at 360–415°C in a flow C3H6+O2+N2 100/100/560 Torr, with and without adding Bi2 (MoO4)3. It is concluded that cobalt stabilizes Fe2+ sites and Bi2(MoO4)3 stabilizes Fe3+ in solid solution and it is proposed that Fe2+?Fe3+ pairs act as active sites in propene mild oxidation. |
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