Paper Title:
Electrolytic Manganese Dioxide Nucleation and Growth on Titanium Substrates
  Abstract

Electrolytic manganese dioxide (EMD) nucleation and growth on titanium substrates from acidic manganese sulfate solutions was studied at 65oC and 90oC at different potentials and sulfuric acid concentrations. Electrochemical experiments allied to SEM examination were performed to characterize the mechanism of nucleation and its evolution with time. The EMD powder produced after a constant charge electrolysis of 448 mA·h was analyzed by SEM, BET, DTA/TG and X-ray diffraction. Results indicated that depending on the experimental conditions nucleation can be either progressive or instantaneous and when three-dimensional nuclei were formed the manganese dioxide deposit presented a higher specific surface area. Surface areas ranging from 51.8 to 168.8 m2/g were obtained under the conditions tested.

  Info
Periodical
Edited by
Dílson S. dos Santos
Pages
114-119
DOI
10.4028/www.scientific.net/MSF.570.114
Citation
A.J.B. Dutra, I.C.F. Almeida, "Electrolytic Manganese Dioxide Nucleation and Growth on Titanium Substrates", Materials Science Forum, Vol. 570, pp. 114-119, 2008
Online since
February 2008
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