Abstract
The Fe doped Bi2Mo3O12 catalysts Bi1·94Fe0·06Mo3O12 and Bi1·80Fe0·20Mo3O12 have been successfully prepared, and their structures have been investigated by using neutron powder diffraction. Rietveld analyses indicate that Fe atoms prefer to take the scheelite vacancies (site c) and the existence of Fe in site c would induce Bi vacancies in adjacent site b synchronously. Thus disordered Bi vacancies could promote catalytic reaction by accelerating the abstraction of α-H from alkene and the transfer of lattice oxygen in crystal structure. Decreases in cell volumes are observed as Fe doping in crystal structures, and this should be induced by the overall decreases in bond lengths and interatomic distances. Calculations of bond valence reveal the possible existence of Fe(II) which should improve the catalytic performance of Fe–Bi–Mo–O catalyst compared with pure Bi2Mo3O12 compound.
Published Version
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