A comprehensive heterogeneous electron transfer rate constant evaluation of dissolved oxygen in DMSO at glassy carbon electrode measured by different electrochemical methods
| Autor: | Obaid Khaliq, Muhammad Ali Versiani, Haji Muhammad, Mehboob Muhammad, Muhammad Latif, Zaheer Masood, Muddasir Hanif, Iftikhar Ahmad Tahiri |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Tafel equation
Supporting electrolyte Chemistry General Chemical Engineering Radical Inorganic chemistry Kinetics Analytical chemistry 02 engineering and technology Chronoamperometry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Coupling reaction 0104 chemical sciences Analytical Chemistry Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Journal of Electroanalytical Chemistry. 775:157-162 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2016.05.049 |
| Popis: | Molecular oxygen radicals are responsible for many problems like aging, cancer, lipid peroxidation, protein denaturation, oxidative stress etc., We present a comprehensive electrochemical investigation of the dissolved oxygen in DMSO containing 0.1 M TBAP as the supporting electrolyte. Different electrochemical techniques such as cyclic voltammetry, chronoamperometry and chronopotentiometry were used to extract heterogeneous kinetics and chemically coupled reaction kinetics related to the O2 radicals. The experimentally determined parameters obtained through different methods were further confirmed through digital simulation (DIGISIM). Heterogeneous electron transfer rate constant (k0) was determined by three different methods, Nicholson & Shain, Gileadi, and the Kochi methods. The calculated k0 values are different from the previously cited values. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect