| Téléchargement | - Voir le manuscrit accepté : Microwave synthesis of polymer-embedded Pt-Ru catalyst for direct methanol fuel cells (PDF, 955 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/jp0519870 |
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| Auteur | Rechercher : Bensebaa, Farid1; Rechercher : Farah, Abdiaziz A.1; Rechercher : Wang, Dashan1; Rechercher : Bock, Christina1; Rechercher : Du, Xiaomei1; Rechercher : Kung, Judy1; Rechercher : Le Page, Yvon1 |
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| Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
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| Format | Texte, Article |
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| Résumé | 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. |
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| Date de publication | 2005 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro du CNRC | NRCC 52169 |
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| Numéro NPARC | 16187138 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | e86f975e-a999-46cb-9d14-894f9eec6d2a |
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| Enregistrement créé | 2010-10-07 |
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| Enregistrement modifié | 2020-04-07 |
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