The Use of Titanium Compounds as Supports and Cocatalysts/Additives for Low-Temperature Fuel Cell Catalysts

Among different non-carbon materials, due to their high corrosion resistance and chemical stability, titanium-based compounds, such as TiO2, TiN, TiC and Ti3C2Tx, are potential supports for PEMFC catalysts. In addition to its main function as a support, due to its catalytic properties, TiO2 is also used as co-catalyst/additive in the catalyst layer. In this work, the use of titanium compounds as catalyst supports and co-catalysts in the membrane electrode assembly of PEMFCs is overviewed and discussed.