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PdCo Nanoparticles Formation at HOPG and High Surface Area Carbon Support Vulcan XC-72R

Published online by Cambridge University Press:  31 January 2011

Lisandra Arroyo-Ramirez ,
Haralampos N Miras ,
Raphael G Raptis  and
Carlos Raul Cabrera
Lisandra Arroyo-Ramirez
Affiliation:
lisyarroyo@gmail.com, University of Puerto Rico, Department of Chemistry, San Juan, Puerto Rico
Haralampos N Miras
Affiliation:
carlos.r.cabreraii@gmail.com, University of Puerto Rico, Department of Chemistry, San Juan, Puerto Rico
Raphael G Raptis
Affiliation:
raphael@epscor.upr.edu, University of Puerto Rico, Department of Chemistry, San Juan, Puerto Rico
Carlos Raul Cabrera
Affiliation:
carlos.cabrera2@upr.educarlos.r.cabreraii@gmail.com
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Abstract

Thermal reduction of PdCo molecular precursors may lead to the controlled production of nanoparticles on high surface area carbon supports that can be used as methanol tolerant oxygen reduction catalysts for direct methanol fuel cells (DMFC). Following this concept, a single molecular precursor source was used for the synthesis of bimetallic nanoparticles on highly oriented pyrolytic graphite (HOPG) and Vulcan (VC) carbon supports. Nanostructural formation of palladium-cobalt on highly ordered pyrolytic graphite (HOPG) was study by AFM, SEM and voltammetry. The relative humidity during precursor deposition was used to control the rings self-formation on HOPG surfaces. Palladium and palladium-cobalt nanoparticles were also formed on high surface area carbon support (Vulcan XC-72R) by thermal reduction and characterized by TEM. The Pd/VC and PdCo/VC nanoparticles were tested for the oxygen reduction reaction (ORR) with and without methanol. The Pd-based catalysts have ORR activity and high methanol tolerance.

Keywords

catalyticorganometallicnucleation & growth
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1213: Symposium T – Nanomaterials for Polymer Electrolyte Membrane Fuel Cells , 2009 , 1213-T10-01
Copyright
Copyright © Materials Research Society 2010

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