| DOI | Trouver le DOI : https://doi.org/10.1016/j.electacta.2013.05.155 |
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| Auteur | Rechercher : Tiido, Kristiina; Rechercher : Alexeyeva, Nadezda; Rechercher : Couillard, Martin1; Rechercher : Bock, Christina1; Rechercher : MacDougall, Barry R.1; Rechercher : Tammeveski, Kaido |
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| Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Sujet | Electrocatalytic activity; Electrocatalytic behavior; Functionalized graphene; Oxygen Reduction; Oxygen reduction reaction; Pt nanoparticles; Pt-based catalyst; Rotating disk electrodes; Catalyst activity; Cyclic voltammetry; Electrolytic reduction; Graphene; Oxides; Rotating disks; Scanning electron microscopy; Titanium dioxide; Transmission electron microscopy; Platinum |
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| Résumé | A nano-sized Pt catalyst supported onto titanium dioxide functionalized graphene nanosheets (TiO2-FGSs) was prepared using the polyol method and utilized for a catalyst activity investigation toward the oxygen reduction reaction (ORR). The electrochemical and microscopic studies were carried out using a 40 wt.% Pt/TiO2-FGS catalyst. Cyclic voltammetry and the rotating disk electrode experiments were performed in 0.5 M H2 SO4 and 0.1 M KOH solutions in order to investigate the electrocatalytic behavior of the prepared catalysts. The composite catalyst samples were characterized by scanning electron microscopy and transmission electron microscopy showing a good dispersion of the Pt particles on the surface of the graphene supported TiO2 particles. The average Pt particle size was 11 ± 2 nm. The values of specific activity and other kinetic parameters were determined from the Tafel plots taking into account the real electroactive area of each electrode. The electrodes exhibited a relatively high electrocatalytic activity for the four-electron reduction of oxygen to water. |
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| Date de publication | 2013-06-19 |
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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 NPARC | 21270411 |
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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 | f370d4d6-2e9e-436c-9701-6dee6a6b1d0e |
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| Enregistrement créé | 2014-02-07 |
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| Enregistrement modifié | 2020-04-22 |
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