Research on Electrochemical Energy Conversion Systems.
Semi-annual rept. no. 10, May-Nov 70,
AMERICAN UNIV WASHINGTON D C
Pagination or Media Count:
The investigation of electrochemical energy conversion systems has involved work on two tasks. The electrochemical reduction of benzofuroxan in aqueous solutions at pH 6.5 has been investigated. Constant potential reductions at -0.10 and -0.40 v SCE were made and dropping mercury polarograms run periodically during the course of the reduction. An insoluble precipitate was observed and repeated reductions were followed by isolation of the product. Preliminary work indicates the product to be 2,3-diaminophenazine. An analysis was made of the rate equation for a steady state reaction which is subject to combined mass transfer and charge transfer control. By considering the overall reaction to be comprised of thre consecutive reversible steps in which the rate constants of each step are potential dependent, the usual current-overpotential relationship was derived. Derivation of this relationship by concept of a diffusion activation energy for the reactant and the product species diffusion step and shows that a limiting current arises without having been specifically considered. Author
- Physical Chemistry
- Electric Power Production and Distribution