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Issue 6, 1997
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Synthesis of lower-valent molybdenum oxides in aqueous solutions by reducing Na2MoO4 with NaBH4

Abstract

Reduction of Na 2 MoO 4 with NaBH 4 in aqueous solutions at ambient temperatures has been investigated systematically by varying the concentration and volume of NaBH 4 as well as the reaction pH. The reduction products have been characterized by X-ray diffraction and differential scanning calorimetry (DSC). The reduction yields metastable, amorphous oxides of lower-valent molybdenum, which crystallize around 350 °C to give the binary oxide MoO 2 and the sodium molybdenum bronze Na 0.88 Mo 6 O 17 . The relative amounts of MoO 2 and Na 0.88 Mo 6 O 17 formed are correlated to the overall reducing power that can be achieved. The concentration and volume of NaBH 4 , the reaction pH and the changes in the degree of condensation of the molybdate ions are all found to influence the overall reducing power.

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Article type: Paper
DOI: 10.1039/A606389F
J. Mater. Chem., 1997,7, 1003-1006

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    Synthesis of lower-valent molybdenum oxides in aqueous solutions by reducing Na2MoO4 with NaBH4

    C. Fo Tsang and A. Manthiram, J. Mater. Chem., 1997, 7, 1003
    DOI: 10.1039/A606389F

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