Electrooxidation of Mn(II) to MnO2 on graphite fibre electrodes

Duarte, M. M. E.; Pilla, A. S.; Mayer, C. E.
May 2003
Journal of Applied Electrochemistry;May2003, Vol. 33 Issue 5, p387
Academic Journal
Electrooxidation of Mn2+ to MnO2 on carbon felt and carbon cloth electrodes (C-materials) in a weak sulfuric acid electrolyte was investigated using stationary and rotating electrodes. These materials exhibit better performance than more conventional materials such as lead. Scanning electron micrographs of the deposits show a uniform cylindrical growth of MnO2 encapsulating the carbon fibres. The deposits spontaneously fracture following straight-lines indicating a fibrous microstructure. X-ray diffraction reveals a γ-MnO2 structure for all deposits.


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