Volume 4, Issue 2, 1986
2nd October, 2022
by Michael Smith
79-105
DOI: doi:10.4152/pea.198502079
The ability of certain polymers to complex with a variety of salts and form electrolytes has been known for more than a decade. These polymer electrolytes can be manufactured in thin films with moderate conductivity, have a broad voltage stability window and form a deformable, stable interface with many electrode materials. As a result of these properties polymer electrolytes offer unique advantages in solid state batteries.
Several aspects of the preparation and performance of these electrolytes are discussed in this article.
by Adriano M. G. Pacheco
107-129
DOI: doi: 10.4152/pea.198502107
A brief critical review is given on the methods usually adopted in processing atmospheric corrosion data. Kinetics of atmospheric corrosion of iron in a marine environment (Sines) are found to follow a linear bilogarithmic relationship, reliable enough to provide good estimates of total losses – as well as corrosion rates - up to 10 years.
Keywords: atmospheric corrosion kinetics; iron; marine environment; outliers; linear bilogarithmic law.
Activation and Characterization of the Pt/1M H2S04 Interface by Cyclic Voltammetry
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by I. T. E. Fonseca, A. C. Marin
131-148
DOI: doi:10.4152/pea.198502131
"Major" and "minor" experimental parameters that can influence the catalytic activity of a polycrystalline Pt electrode, in an acid aqueous medium, are emphasized. Typical results, demonstrating such effects are presented.
It is also shown that cyclic voltammetry is a powerful technique, for activation and control of the state of the working Pt surface and also for control of impurities in the base electrolyte solution.
However, the aim of this paper is to give some advices to all those that have to work with Pt. for the purpose of comparing catalytic activity, induced by different means.
Adsorption of Urea from Aqueous Sodium Chloride Solutions
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by Fernando Silva, M. Rosa Barbosa
149-168
DOI: doi:10.4152/pea.198502149
Measurements of the differential capacity of a Hg electrode in contact with six aqueous solutions of urea were made using a computer controlled system which sampled 75 times during the drop life. The parameters of the adsorption isotherm are determined under appropriate thermodynamic conditions. The results indicate that urea adsorbs much less strongly than thiourea.
by J. E. Simões
169-170
DOI: doi:10.4152/pea.198502169
