DOI | Resolve DOI: https://doi.org/10.1016/j.electacta.2013.05.155 |
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Author | Search for: Tiido, Kristiina; Search for: Alexeyeva, Nadezda; Search for: Couillard, Martin1; Search for: Bock, Christina1; Search for: MacDougall, Barry R.1; Search for: Tammeveski, Kaido |
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Affiliation | - National Research Council of Canada. Energy, Mining and Environment
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Format | Text, Article |
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Subject | 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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Abstract | 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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Publication date | 2013-06-19 |
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In | |
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Language | English |
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Peer reviewed | Yes |
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NPARC number | 21270411 |
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Export citation | Export as RIS |
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Report a correction | Report a correction (opens in a new tab) |
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Record identifier | f370d4d6-2e9e-436c-9701-6dee6a6b1d0e |
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Record created | 2014-02-07 |
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Record modified | 2020-04-22 |
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