Heterogeneous diffusion rate constant

{
  "id": "MLC-T-CHM-005247",
  "term": "Heterogeneous diffusion rate constant",
  "field": "Chemistry",
  "definition": "The rate constant, in meters per second, that describes diffusion-limited transport of a species to an electrode, defined as the limiting current divided by n F c A, where n is the charge number, F the Faraday constant, c the bulk concentration, and A the electrode area. It equals the diffusion coefficient divided by the diffusion layer thickness, so it rises with stirring or electrode rotation, which thins the layer.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "Faraday constant",
    "charge number",
    "coefficient",
    "diffusion",
    "diffusion coefficient",
    "limiting current",
    "stoichiometric"
  ],
  "references": [
    "PAC, 1974, 37, 499. 'Electrochemical nomenclature' on page 513 (https://doi.org/10.1351/pac197437040499)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/heterogeneous-diffusion-rate-constant/"
}