Facile assembly of an efficient CoOx water oxidation electrocatalyst from Co-containing polyoxotitanate nanocages

Cobalt-containing polyoxotitanates (TiCo) are excellent precursors for the simple and scalable preparation of Nocera-type CoOx water-oxidation electrocatalysts. The TiCo cages serve as a reservoir for cobalt ions in a titania matrix on fluoride-doped tin oxide electrodes, and form, in situ, the active CoOx catalyst for O-2 evolution with high stability in phosphate buffer in pH neutral water.