Langmuir 2006, 22, 10465-10471
10465
Synthesis, Characterization, and Electrocatalytic Activity of PtPb Nanoparticles Prepared by Two Synthetic Approaches† Laif R. Alden,‡ Chandrani Roychowdhury,‡ Futoshi Matsumoto, Daniel K. Han, Varvara B. Zeldovich, He´ctor D. Abrun˜a,* and Francis J. DiSalvo* Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell UniVersity, Ithaca, New York 14853-1301 ReceiVed May 12, 2006. In Final Form: August 18, 2006 Intermetallic PtPb nanoparticles have been synthesized by two solution-phase reduction methods. In the first (PtPbB), Pt and Pb salts were reduced by sodium borohydride in methanol at room temperature. In the second (PtPb-N), metal-organic Pt and Pb precursors were reduced by sodium naphthalide in diglyme at 135 °C. Both methods produced small agglomerated nanoparticles of the ordered intermetallic PtPb (mean crystal domain size
