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In H2/N2 atmosphere, the reduction behavior of the stoichiometric compound, Fe2(MoO4)3, was studied by in-situ Mossbauer spectroscopy (in-situ MBS), temperature-programmed reduction (TPR) and X-ray diffraction (XRD). The results showed that the reduction products, β-FeMoO4, Mo4O11, MoO2, Fe3O4, Fe2Mo3O8, Fe and Mo, as well as iron-molybdenum alloys, were formed subsequently when the reduction temperature was raised. It was found that when Mo6+ were reduced to Mo4+, Fe2+ were oxidized to Fe3+. Due to the interactions among the metal ions and the electron transfers, the reduction processes of the metal ions in Fe2(MoO4)3 are very complex. According to the results of XRD and MBS obtained at various TPR stages, the reaction equations for the reduction stages were proposed. The Mossbauer spectrum of an intermediate species, Fe2Mo3O8, was found to exhibit two doublets, with I.S.=0.90mm/s and Q.S. =0.58 mm/s, and I.S. = 1.02mm/s and Q.S. = 1.04mm/s, respectively.
In H2 / N2 atmosphere, the reduction behavior of the stoichiometric compound, Fe2 (MoO4) 3, was studied by in situ Mossbauer spectroscopy (in-situ MBS), temperature- programmed reduction (TPR) and X-ray diffraction (XRD) . The results showed that the reduction products, β-FeMoO4, Mo4O11, MoO2, Fe3O4, Fe2Mo3O8, Fe and Mo, as well as iron-molybdenum alloys, were well formed iron-molybdenum alloys, were formed subsequently when the reduction temperature was raised. It was found that when Mo6 + were Due to the interactions among the metal ions and the electron transfers, the reduction processes of the metal ions in Fe2 (MoO4) 3 are very complex. According to the results of XRD and MBS obtained at The Mossbauer spectrum of an intermediate species, Fe2Mo3O8, was found to exhibit two doublets, with IS = 0.90 mm / s and QS = 0.58 mm / s, and IS = 1.02 mm / s and QS = 1.04mm / s, respectively.