| Autor: |
Legagneur, Vanessa, Salle, Annie Le Gal La, Verbaere, Alain, Piffard, Yves, Guyomard, Dominique |
| Zdroj: |
Journal of Materials Chemistry; December 2000, Vol. 10 Issue: 12 p2805-2810, 6p |
| Abstrakt: |
New layered vanadium oxides were prepared at room temperature via either electrochemical or chemical topotactic oxidation in aqueous media of the layered, solid precursor H2V3O8. Their formula MyH1 − yV3O8·nH2O (M = Li, Na, K) shows the oxidation of vanadium to occur with the removal of one hydrogen atom and with a partial exchange of the remaining proton. A structural study by powder X-ray diffraction, including a Rietveld analysis, clearly indicated that the structure of the anionic covalent layers, V3O8, are preserved in going from H2V3O8 to MyH1 − yV3O8·nH2O. In the latter compounds, all the water molecules occupy the interlayer space along with the M+ ions. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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