Highly effective oxygen reduction activity and durability of titanium oxide modified PtAu/C electrocatalysts†
Abstract
The oxygen reduction reaction (ORR) activity of Pt90Au10/C is promoted by TiOx modification. After accelerated durability testing, the ORR activity of PtAu/C with 3 wt% TiOx is 2.7 times higher than that of the Pt/C, attributed to the suboxide formation and moderate surface Pt–Au ratio.