Highly effective oxygen reduction activity and durability of antimony-doped tin oxide modified PtPd/C electrocatalysts

Abstract

Antimony-doped tin oxide (ATO) nanoparticles are synthesized by a simple one-step hydrothermal method. The oxygen reduction reaction (ORR) activity of the PtPd/C catalyst is promoted by the presence of ATO. Moreover, after accelerated durability testing, the PtPd/C-ATO catalyst reserves most of its electrochemically active surface area (ESA) and ORR activity compared to the PtPd/C catalyst. The improved electrochemical stability and activity of PtPd/C-ATO is attributed to the high stability of ATO support and the strong interaction between Pt and ATO.