Synthesis of vanadium spinels by hydrogen-reduction of oxide precursors |
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| Authors: | A Manthiram |
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| Institution: | Department of Chemistry, Madurai Kamaraj University, P.G. Extension Centre, St. John''s College Campus, Palayamkottai 627 002, India |
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| Abstract: | Two series of vanadium spinels, viz.AV2O4 and A1.5O4(A = Mg, Mn and Zn) have been prepared at significantly lower temperatures (700–850 K) by hydrogen-reduction of the corresponding oxide precursors, AV2O6 and A2V2O7 respectively. The cation distribution in these phases have been determined by X-ray powder diffraction intensity analysis. The former vanadium(III) spinels have a cation distribution of (A2+)tV23+]oO4 while the latter mixed-valence vanadium spinels have a distribution of (A2+)tA0.52+V1.03+V0.54+]oO4. |
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