Preparation of Pt/Rh bimetallic colloidal particles using borohydride reduction

Introduction In this paper we present the preparation of Pt/Rh bimetallic particles by borohydride-reduction method in the presence of poly(N-vinyl-2-pyrrolidone) in water. For the Pt/Rh bimetallic particles, measurements of EXAFS have been applied in order to specify the distribution of atoms within a bimetallic particle. The analysis of EXAFS suggests that the distribution of atom within a bimetallic particle produced by borohydride-reduction is different from that expected from the core-shell structure.