Kinetics of molecular oxygen electroreduction on platinum modified by tin underpotential deposition
作者： C.F. Zinola , J. Rodríguez , G. Obal
关键词: Oxygen 、 Inorganic chemistry 、 Electrochemistry 、 Underpotential deposition 、 Chemistry 、 Rotating disk electrode 、 Noble metal 、 Cyclic voltammetry 、 Tin 、 Platinum
摘要: The kinetics of molecular oxygen electroreduction were studied on platinum surfaces modified by tin underpotential deposition. surface process was analysed cyclic voltammetry in aqueous 10−4 M tin(II)/1 sulfuric acid the 0.05 to 0.70 V vs RHE range. Platinum sites involving (1 1 0) planes are mainly related deposition as observed hydrogen sorption region. Kinetic runs for reduction performed with rotating ring-disc electrode technique tin-modified surfaces. It concluded that takes place through bulk peroxide and water formation. This interpretation confirmed calculating reaction order respect oxygen. Electrochemical rate constants pathways calculated a function potential based Damjanovic's scheme.
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