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Kinetic measurements during transient film growth on zinc
Chen,Yun; Lobo,Rui F. M.; Santos,Diogo M. F.; Sequeira,César A. C.The electrochemical behaviour of zinc has been extensively studied in alkaline and acid media, but only a few studies have been reported in neutral solutions, particularly in deaerated media. Zinc passivation in neutral medium and the effect of the ClO4- ion on the nucleation and growth of the passive layer is studied in this paper by a transient technique at different electrolyte concentrations and applied pot...
Kinetic measurements during transient film growth on zinc
Lobo, R. F. M.; Santos, Diogo M. F.; Sequeira, César A. C.; Yun, ChenQuimica Nova, Vol. 32, Nº2 ; The electrochemical behaviour of zinc has been extensively studied in alkaline and acid media, but only a few studies have been reported in neutral solutions, particularly in deaerated media. Zinc passivation in neutral medium and the effect of the ClO4- ion on the nucleation and growth of the passive layer is studied in this paper by a transient technique at different electrolyte ...
Oxygen reduction at a manganate electrocatalyst in KOH solutions
Sequeira,César A. C.; Santos,Diogo M. F.; Baptista,WalmarThe electrocatalysis of the oxygen reduction reaction by lanthanum calcium manganate, (La0.5Ca0.5MnO3) (LCM) has been studied by cyclic voltammetry using the rotating ring-disc electrode technique (RRDE) in alkaline medium. From the ring-disc data and other kinetic parameters it has been assumed that the oxygen reduction occurs by dissociative chemisorption at low overpotentials. At higher overpotentials, the f...
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