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Electrochemical Synthesis and Characterization of 1,2-Naphthaquinone-4-Sulfonic...
Akinyeye, Richard Odunayo; Michira, Immaculate; Sekota, Mantoa; Ahmed, Amir Al; Tito, Duarte; Baker, Priscilla Gloria LorrainePolypyrrole thin film microelectrodes prepared from an aqueous solution of the sodium salt of 1, 2-napthaquinone-4-sulfonic acid and pyrrole in hydrochloric acid as the supporting electrolyte was characterized electrochemically for the first time and found to exhibit good electronic and spectroscopic properties. Voltammetric investigations showed that the polymer exhibited quasireversible kinetics in a potentia...
Caracterização por XPS de filmes passivos formados sobre aços de baixa liga em ...
Alves,Valéria Almeida; Brett,Christopher Michael Ashton; Montemor,Maria de FátimaPassive films formed in bicarbonate solutions on carbon steel, chromium steel and high speed steel have been characterized by XPS. The passive films formed on chromium and high speed steels showed superior protective properties than those formed on carbon steel. It was confirmed by XPS that the steel composition influences the passive film composition. Chromium oxide and hydroxide, as well as molybdenum and tun...
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