Issue 6, 1992

Hydrogen insertion compounds of V3O7 and V6O13: structural and thermochemical aspects

Abstract

Hydrogen insertion compounds, HxV3O7(0 < x < 1.51) and HxV6O13(0 < x < 5.82), have been prepared at ambient temperatures, both chemically, by hydrogen spillover, and electrochemically. Powder X-ray diffraction data suggest that both hydrogen insertion reactions proceed topotactically. Vibration spectra confirm that the resulting compounds can be formulated as the oxyhydroxides V3O7–x/2(OH)x(x < 1.51) and V6O13–x/2(OH)x(x < 5.82). The enthalpies of formation of HxV3O7(x= 0.62 and 1.40) and HxV6O13(x= 5.82) and the corresponding parent oxides have been determined by solution calorimetry. The stabilities of the insertion compounds towards decomposition, disproportionation and oxidation are discussed.

Article information

Article type
Paper

J. Mater. Chem., 1992,2, 601-607

Hydrogen insertion compounds of V3O7 and V6O13: structural and thermochemical aspects

A. M. Chippindale and P. G. Dickens, J. Mater. Chem., 1992, 2, 601 DOI: 10.1039/JM9920200601

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