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Download fileSynthesis and Characterization of a Pt3Ru1/Vulcan Carbon Powder Nanocomposite and Reactivity as a Methanol Electrooxidation Catalyst
journal contribution
posted on 11.07.2003, 00:00 authored by Joshua T. Moore, James D. Corn, Deryn Chu, Rongzhong Jiang, Deborah L. Boxall, Edward A. Kenik, C. M. LukehartThermal treatment of [Ru(2,3-bis(2-pyridyl)quinoxaline)3(PtCl2)3](BF4)2/Vulcan carbon
powder composites under reactive conditions forms Pt−Ru/carbon nanocomposites containing
27−34 wt % metal alloy as highly dispersed nanoparticles of ca. Pt75Ru25 stoichiometry.
The metal nanoparticles have an average diameter of 6 nm (by TEM) and an fcc unit cell of
lattice constant 3.907 (9) Å, as expected for Pt-rich Pt−Ru alloys. On-particle HR-EDS
analysis indicates that gross phase separation of Pt and Ru does not occur on the nanoparticle
scale. Evaluation of the performance of this nanocomposite as a methanol electrooxidation
catalyst in a direct methanol fuel cell and in an electrochemical cell designed for combinatorial
testing is reported.