Electrode Surface
Use the H2 Electrode Surface or the O2 Electrode Surface nodes to define an electrode surface located at exterior boundaries of a H2/O2 Gas-Electrolyte Compartment domain that are also external to the domain selection of the interface. Set the electric potential of the electrode or specify a current condition that the potential of the electrode shall fulfill.
Film Resistance
Use a film resistance if you want to include an additional potential drop due to an ohmic resistance at the interface between the electrode and the electrolyte (a contact resistance), for instance due to build-up of insulating deposits.
Specify either a Surface resistance Rfilm (SI unit: Ω·m2) directly or choose the Thickness and conductivity option to calculate the surface resistivity based on a depositing film thickness.
Specify the electrode reaction using Electrode Reaction child nodes.