Electrochemical reactions at lead dioxide electrodes
thesisposted on 2018-08-13, 16:20 authored by Peter C. Jones
Preliminary passivation studies established that kinetic measurements could be made at α- and β-lead dioxide electrodes, in perchloric acid electrolytes, without the intrusion of solid films. The kinetics of the rate controlling exchange reaction at α- and β-PbO2 have been investigated using the galvanostatic pulse technique. The overpotential-current density data was interpreted in terms of two rate controlling charge transfer mechanisms. Around the equilibrium potential the reaction mechanism appears as a simultaneous two-electron transfer which changed to two consecutive single-electron transfer steps at high overpotential. Possible reaction mechanisms have been discussed on the basis of the observed kinetic parameters. Differential capacitance-potential data for α- and β-PbO2 has been measured in inert electrolytes. A comparison of the electrochemical behaviour of α- and β-PbO2 has been made.
Loughborough University of Technology (scholarship).
Publisher© Peter Christopher Jones
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NotesA Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.