Accession Number : AD0693308

Title :   DISCHARGE MECHANISM OF THE V2O5 ELECTRODE.

Descriptive Note : Technical rept.,

Corporate Author : OREGON STATE UNIV CORVALLIS DEPT OF CHEMISTRY

Personal Author(s) : Newby,Kenneth R. ; Scott,Allen B.

Report Date : 30 AUG 1969

Pagination or Media Count : 28

Abstract : The behavior of V2O5 single crystals, grown from the melt, during cathodic polarization and recovery, was investigated. The dependence of potential upon pH showed that the only plausible reduction product was a solid oxide or oxyhydroxide, polarization being due to the formation of a solid solution. In the pH range 2.0 - 5.5, the curve of electrode potential vs. time during both polarization and recovery was accurately predicted by an equation, already applied to MnO2, derived from the assumption that the product is removed from the surface by diffusion into the electrode. Using tritium as a tracer, it was shown that hydrogen is incorporated in the electrode during discharge at pH 4.7. The activation energy for diffusion was found to be 6.7 kcal/mole, which is consistent with bipolar diffusion of protons and electrons. (Author)

Descriptors :   (*VANADIUM COMPOUNDS, *ELECTROCHEMISTRY), OXIDES, PH FACTOR, ELECTRODES, SINGLE CRYSTALS, HYDROGEN, POLARIZATION

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE