Abstract
Enhanced anodic photocurrents are observed at silver electrodes when the electrolyte contains halide ions. The potential behavior of this effect suggests the formation of a silver halide surface layer. This surface layer then enhances the photocurrent by reducing the back‐reaction at the electrode surface. Considerable structure is observed in the photocurrent as a function of photon energy. This structure is related to the electronic structure of the surface film. These kinds of measurements appear to be a promising technique for studying films on metal electrodes such as might occur in corrosion or passivation processes.