Monodisperse and highly active PtNi nanoparticles for O-2 reduction

Monodisperse PtNi nanoparticles with various compositions were synthesized by a wet-chemical approach. After electrochemical dissolution of Ni on the particle surface, these particles exhibit a 20-30-fold enhancement in O-2 reduction activity as compared to the commercial Pt/C catalysts. (C) 2009 Elsevier B.V. All rights reserved.