The Maxwell circuit implies that there is a long-range, faradaic process in parallel with a non-faradaic process. As the origin of the non-faradaic process was determined to be associated with the a-TiO2 protection layer, the mechanism of this process was investigated further. Experiments in aprotic solution showed that proton intercalation into the a-TiO2 material is not the source of the non-faradaic process, despite previous knowledge that this can occur in a-TiO2 in the potential range of interest here.