Randles-Ševčík equations

{
  "id": "MLC-T-CHM-009915",
  "term": "Randles-Ševčík equations",
  "field": "Chemistry",
  "definition": "A pair of equations that give the peak current in linear sweep and in cyclic voltammetry in terms of how concentrated the electroactive species is in the bulk solution, one for a reversible and one for an irreversible charge transfer. In both, the peak current grows with electrode area, the number of electrons transferred, the diffusion coefficient and the square root of the scan rate. The irreversible form also contains the transfer coefficient alpha, which is commonly taken as about 0.5.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "cyclic voltammetry",
    "electron number of an electrochemical reaction",
    "linear-scan voltammetry"
  ],
  "references": [
    "PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 677 (https://doi.org/10.1515/pac-2018-0109)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/randles-sevcik-equations/"
}