Electrochemical behaviour of a vanadium anode in phosphoric acid and phosphate solutions
Creators
- 1. Laboratoire d'Electrochimie, Ecole Nationale Superieure de Chimie de Rennes, Avenue du General Leclerc, 35700 Rennes (France)
- 2. Laboratoire de Chimie du Solide, UMR 6511, Ecole Nationale Superieure de Chimie de Rennes, Avenue du General Leclerc, 35700 Rennes (France)
Description
Anodic polarisation of a vanadium electrode has been studied in H3PO4 solutions and some phosphate solutions: LiH2PO4, NaH2PO4, KH2PO4 and NH4H2PO4. The anodic behaviour of a vanadium electrode showed similarities in weak concentrated H3PO4, in LiH2PO4 and NaH2PO4 solutions: the polarisation curve exhibited a current peak followed by current oscillations and then a current plateau. Concentrated H3PO4, 1 M KH2PO4 and NH4H2PO4 solutions involved vanadium passivation with a very slight current density plateau. Yellow compound identified to VOPO4.2H2O was obtained after controlled potential oxidation of vanadium in 5-10 M H3PO4. Green products were obtained in 1 M phosphate solutions and in 1-3 M H3PO4 on vanadium anode after controlled potential electrolysis. All these vanadophosphate compounds contained the monovalent cation which was present in the solution
Additional details
Identifiers
- DOI
- 10.1016/j.electacta.2005.06.030;
- PII
- S0013-4686(05)00714-0;
Publishing Information
- Journal Title
- Electrochimica Acta
- Journal Volume
- 51
- Journal Issue
- 10
- Journal Page Range
- p. 1990-1995
- ISSN
- 0013-4686
- CODEN
- ELCAAV
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 38016208
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AMMONIUM PHOSPHATES; ANODES; ELECTROCHEMISTRY; ELECTROLYSIS; PASSIVATION; PHOSPHORIC ACID; POLARIZATION; POTASSIUM PHOSPHATES; SOLUTIONS; VANADIUM
- Descriptors DEC
- ALKALI METAL COMPOUNDS; AMMONIUM COMPOUNDS; CHEMISTRY; DISPERSIONS; ELECTRODES; ELEMENTS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; LYSIS; METALS; MIXTURES; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; POTASSIUM COMPOUNDS; TRANSITION ELEMENTS
Optional Information
- Copyright
- Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.