“Perovskitization”‐Assisted Electrochemical Reduction of Solid TiO₂ in Molten CaCl₂

Abstract

Speed up: In situ formation of perovskite phases (CaδTiOx, x/δ≥2) during electroreduction of porous TiO2 pellets to Ti metal in molten CaCl2 kinetically retards the process. Ex situ perovskitization of TiO2 with CaO (see picture) can prevent in situ perovskitization during electrolysis, thereby significantly increasing the electroreduction speed.