Add time:09/08/2019         Source:sciencedirect.com

The influence of the concentration of the sodium perchlorate supporting electrolyte on the standard electrode reaction rate constants for the one-electron reduction of Eu(CF3SO3)3 on mercury in dimethylsulfoxide has been studied. The ksapp-values were derived from both ac polarography on the dropping mercury electrode and from cyclic voltammetry on a hanging mercury drop in a two-electrode system. The ac data was evaluated by Randles [Trans. Faraday Soc. 48 (1952) 937] and by Sluyters [Rec. Trav. Chim. 79 (1960) 1092] methods. The standard reaction rates from cyclic voltammetry were extracted via a simulation program. Densities, viscosities, specific resistances (resistivities) and double layer capacitances of the electrolytes were measured. Correlations between electrolyte properties and the ksapp-values were investigated. The standard electrode reaction rates were also treated within the Frumkin theory.

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