The Porous Electrode Reaction node defines the electrode kinetics for a charge transfer reaction that occurs at the interface between the pore electrolyte and the electrode matrix a porous electrode. The node can be added as subnode to a Porous Electrode node. Add multiple nodes to the same Porous Electrode node to model multiple reactions, for instance in mixed potential problems.

See the Electrode Reaction node for a description of the Equilibrium Potential, Electrode Kinetics, Stoichiometric Coefficients and Heat of Reaction sections.

The Active specific surface area, av (SI unit: m2/m3) specifies the area of the electrode-electrolyte interface that is catalytically active for this porous electrode reaction. av is multiplied by iloc, defined in the Electrode Kinetics section, to produce a current source in the domain.