A comprehensive heterogeneous electron transfer rate constant evaluation of dissolved oxygen in DMSO at glassy carbon electrode measured by different electrochemical methods

作者：Muhammad, Haji; Tahiri, Iftikhar Ahmad^*; Muhammad, Mehboob; Masood, Zaheer; Versiani, Muhammad Ali^*; Khaliq, Obaid; Latif, Muhammad; Hanif, Muddasir^*

来源：Journal of Electroanalytical Chemistry, 2016, 775: 157-162.

DOI：10.1016/j.jelechem.2016.05.049

• Heterogeneous electron transfer rate constant (k(0))
• Transfer coefficient
• Diffusion coefficient
• Tafel plot

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 O-2 radicals. The experimentally determined parameters obtained through different methods were further confirmed through digital simulation (DIGISIM). Heterogeneous electron transfer rate constant (k(0)) was determined by three different methods, Nicholson & Shain, Gileadi, and the Kochi methods. The calculated k(0) values are different from the previously cited values.

• 出版日期2016-8-15
• 单位江西师范大学