Methods to Improve Electrochemical Reversibility at Carbon Electrodes

  title={Methods to Improve Electrochemical Reversibility at Carbon Electrodes},
  author={R Mark Wightman and Mark R. Deakin and Paul M. Kovach and Werner G. Kuhr and Kenneth J. Stutts},
Carbon electrodes are frequently used for electroanalytical studies of oxidizable compounds. However, for many compounds, heterogeneous charge-transfer rates are very slow at carbon electrodes, leading to illdefined voltammograms. Ascorbic acid (vitamin C) is perhaps one of the best examples of such phenomena, with a peak potential that is approximately 350 mV more positive at most carbon surfaces than at mercury electrodes. Ferricyanide also exhibits voltammetry at carbon electrodes that is… CONTINUE READING