Because of their predictive-quality description of the surface kinetics, transportcoupled 1p-mkm models can provide us with valuable (atomically-resolved) mechanistic insights. Early such coupled models, for example, already found some success in elucidating catalytic mechanisms by comparing simulated polarization curves or reaction orders against experiments . More recent models have now advanced to further include a more realistic description of the electrical double layer while explicitly including field-dependent DFT kinetics. Ringe et al., for example, simulated CO 2 electro-reduction over Au by (self-consistently) integrating such a 1pmkm with a 1D transport model that could account for diffusion, migration, and buffer reactions . Figure ) reproduces the resulting polarization curve which shows potential-dependent transitions between three distinct kinetic regimes: from a ratelimiting *COOH reduction step at low overpotentials, to the field-driven adsorption of CO 2 at intermediate ones, and finally CO 2 mass transport at high overpotentials.