โ Scribed by S.M. Ahmed
No coin nor oath required. For personal study only.
A&tract-Redox reactions with CU(NH~)~~/'~, Fe(CN)~-/4-, Fe'+"+ and IT/I2 were studied on 11-C surfaces of MoS, using rdes. From electrophoretic measurements, the zpc was found to occur at pH 2. The role of potential-determining ions and the effects of specific adsorption of ions on the electrode behaviour have been discussed. The change of potential with pH was with a solution saturated with molybdenum and S2-. -30 mV/pH unit for MoS, electrode in contact ions. From the information available, an energy level diagram has been constructed. This diagram is in agreement with the observed behaviour that electron exchange for the first three redox couples occurs with the conduction band, except that the electron transfer from the reduced species, Fe(CN)z-and Fe'+, 1x1 the reverse direction (oxidation) is partly and totally restricted, respectively. The charge transfer behaviour in the ease of I; /I, couple, aDDcarS to be much more complex, most probably involving adsorption of 1. on the surface.--_ __
๐ SIMILAR VOLUMES
The radar systems Cu(NH,) 2 +"+, Fe(CN)6"4 " and Fe 3+t2+ and oxygen reduction have been studied on MoS, surfaces normal to the C-axis and parallel to the C-axis, using rotating disc electrodes under potentiostatic conditions . Current-voltage curves were obtained and apparent exchange current densi