Iridium catalyst supported on conductive titanium oxides for polymer electrolyte membrane electrolysis

Abstract

The Ir-based Magneli phase titanium oxide supported catalyst is synthesized using the polyol approach. Its structure and activity in oxygen evolution reaction were evaluated by means of transmission electron microscopy, cyclic and linear sweep voltammetry. The catalyst structure is characterized by small Ir nanoparticles well dispersed over the support surface. The synthesized titanium suboxide supported catalyst showed very high activity in OER. Its mass activity ca. 3 times higher in comparison with the commercial IrOx catalyst