کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9634210 463399 2005 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The kinetics of electroreduction of peroxodisulfate ions on single crystal cadmium and bismuth electrodes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The kinetics of electroreduction of peroxodisulfate ions on single crystal cadmium and bismuth electrodes
چکیده انگلیسی
The electroreduction of the peroxodisulfate anions on the electrochemically polished (EP) Cd(0 0 0 1), Bi(1 1 1) and Bi(011¯) planes has been studied by cyclic voltammetry, rotating disc electrode and impedance methods. The rate constant values of the heterogeneous electroreduction reaction of the S2O82- anion on the EP Cd(0 0 0 1) and Bi(h k l) planes dependent on electrode polarisation and base electrolyte concentration have been calculated. The values of apparent transfer coefficient αapp corrected for the double layer effect (αapp ⩽ 0.15) only very weakly depend on the electrode potential and base electrolyte concentration. The very low values of the apparent charge transfer coefficient for S2O82- electroreduction show that the activationless charge transfer mechanism is valid for EP Cd(0 0 0 1) and EP Bi(h k l) electrodes in various surface inactive base electrolyte solutions. This conclusion is in a good agreement with the theoretical models for the high hydrogen overvoltage metals based on the diabatic charge transfer mechanism from the metal to an ion [R.R. Nazmutdinov, D.V. Gluhov, O.A. Petrii, G.A. Tsirlina, G.N. Botikova, J. Electroanal. Chem. 552 (2003) 261].
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 582, Issues 1–2, 15 August 2005, Pages 130-143
نویسندگان
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