Microwave Synthesis of Polymer-Embedded Pt−Ru Catalyst for Direct Methanol Fuel Cell

Abstract

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=e86f975e-a999-46cb-9d14-894f9eec6d2a http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=e86f975e-a999-46cb-9d14-894f9eec6d2a Process and EnVironmental Technology, National Research Council of Canada, 1200 Montreal Road, M-12 Ottawa, Ontario K1A 0R6, Canada ReceiVed: April 17, 2005; In Final Form: June 24, 2005 Platinum-ruthenium nanoparticles stabilized within a conductive polymer matrix are prepared using microwave heating. Polypyrrole di(2-ethylhexyl) sulfosuccinate, or PPyDEHS, has been chosen for its known electrical conductivity, thermal stability, and solubility in polar organic solvents. A scalable and quick two-step process is proposed to fabricate alloyed nanoparticles dispersed in PPyDEHS. First a mixture of PPyDEHS and metallic precursors is heated in a microwave under reflux conditions. Then the nanoparticles are extracted by centrifugation. Physical characterization by TEM shows that crystalline and monodisperse alloyed nanoparticles with an average size of 2.8 nm are obtained. Diffraction data show that crystallite size is around 2.0 nm. Methanol electro-oxidation data allow us to propose these novel materials as potential candidates for direct methanol fuel cells (DMFC) application. The observed decrease in sulfur content in the polymer upon incorporation of PtRu nanoparticles may have adversely affected the measured catalytic activity by decreasing the conductivity of PPyDEHS. Higher concentration of polymer leads to lower catalyst activity. Design and synthesis of novel conductive polymers is needed at this point to enhance the catalytic properties of these hybrid materials.

Transition Metal Carbides and Nitrides as Electrode Materials for Low Temperature Fuel Cells

“…The most important component of low temperature fuel cells in terms of cost, performance and long-term stability is the membrane electrode assembly (MEA) consisting of the anode, cathode and electrolyte [13][14][15][16][17][18][19]. The price of membranes can be greatly reduced by large scale production as the fuel cells are commercially produced for widespread use.…”

Green synthesis of tunable Cu(In1−xGax)Se2 nanoparticles using non-organic solvents

“…7, 8 Oxides nanomaterials are used to improve photocatalysis efficiency 9,10 and gravimetric energy density of lithium ion batteries.…”

A facile synthesis of palladium nanoparticles supported on functional carbon nanotubes and its novel catalysis for ethanol electrooxidation

“…Pt-based catalysts are recognized as the best catalysis for low temperature fuel cells [7]. However, the limitations of the use of Pt-based electrocatalysis come from their high cost and limited resource of Pt [8]. At the same time, the poor utilization and the poisoning of Pt catalyst particularly in alkaline solution also limit its applications [9].…”