Enhanced oxygen reduction reaction on PtPb ordered intermetallic nanoparticle/TiO2/carbon black in acidic aqueous solutions

摘要

The electrochemical oxygen reduction reaction (ORR) was accelerated on PtPb ordered intermetallic nanoparticles (NPs) deposited on titanium oxide (TiO2)/carbon black (CB) and compared with the benchmarked rate on Pt NPs/CB. Immobilization of the PtPb NPs on TiO2 was a key factor to enhance ORR activity on the PtPb NP surface. The electric interaction between the PtPb NPs and TiO2 improved the electrocatalytic activity for ORR in a 0.1 M HClO4 acidic solution. (C) 2014 Elsevier B.V. All rights reserved.