Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes
Optimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct methanol fuel cells (DMFCs) and methanol electrolyzers for hydrogen production. High surface area Ti supports are known to increase Pt catalytic activity and utilization. Pt has been deposited on black ti...
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MDPI AG
2022-09-01
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| author | Aikaterini Touni Xin Liu Xiaolan Kang Chrysanthi Papoulia Eleni Pavlidou Dimitra Lambropoulou Mihalis N. Tsampas Athanasios Chatzitakis Sotiris Sotiropoulos |
| author_facet | Aikaterini Touni Xin Liu Xiaolan Kang Chrysanthi Papoulia Eleni Pavlidou Dimitra Lambropoulou Mihalis N. Tsampas Athanasios Chatzitakis Sotiris Sotiropoulos |
| author_sort | Aikaterini Touni |
| collection | DOAJ |
| description | Optimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct methanol fuel cells (DMFCs) and methanol electrolyzers for hydrogen production. High surface area Ti supports are known to increase Pt catalytic activity and utilization. Pt has been deposited on black titania nanotubes (bTNTs), Ti felts and, for comparison, Ti foils by a galvanic deposition process, whereby Pt(IV) from a chloroplatinate solution is spontaneously reduced to metallic Pt (at 65 °C) onto chemically reduced (by CaH<sub>2</sub>) TNTs (resulting in bTNTs), chemically etched (HCl + NaF) Ti felts and grinded Ti foils. All Pt/Ti-based electrodes prepared by this method showed enhanced intrinsic catalytic activity towards MOR when compared to Pt and other Pt/Ti-based catalysts. The very high/high mass specific activity of Pt/bTNTs (ca 700 mA mg<sub>Pt</sub><sup>−1</sup> at the voltammetric peak of 5 mV s<sup>−1</sup> in 0.5 M MeOH) and of Pt/Ti-felt (ca 60 mA mg<sub>Pt</sub><sup>−1</sup>, accordingly) make these electrodes good candidates for MOR anodes and/or reactive Gas Diffusion Layer Electrodes (GDLEs) in DMFCs and/or methanol electrolysis cells. |
| first_indexed | 2024-03-09T21:25:22Z |
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| last_indexed | 2024-03-09T21:25:22Z |
| publishDate | 2022-09-01 |
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| series | Molecules |
| spelling | doaj.art-1e4590f94ca14908b3cbecaf016a6c6c2023-11-23T21:10:25ZengMDPI AGMolecules1420-30492022-09-012719638210.3390/molecules27196382Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt ElectrodesAikaterini Touni0Xin Liu1Xiaolan Kang2Chrysanthi Papoulia3Eleni Pavlidou4Dimitra Lambropoulou5Mihalis N. Tsampas6Athanasios Chatzitakis7Sotiris Sotiropoulos8Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceCentre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, 0349 Oslo, NorwayCentre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, 0349 Oslo, NorwayDepartment of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDutch Institute for Fundamental Energy Research (DIFFER), 5612 AJ Eindhoven, The NetherlandsCentre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, 0349 Oslo, NorwayDepartment of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceOptimized Pt-based methanol oxidation reaction (MOR) anodes are essential for commercial direct methanol fuel cells (DMFCs) and methanol electrolyzers for hydrogen production. High surface area Ti supports are known to increase Pt catalytic activity and utilization. Pt has been deposited on black titania nanotubes (bTNTs), Ti felts and, for comparison, Ti foils by a galvanic deposition process, whereby Pt(IV) from a chloroplatinate solution is spontaneously reduced to metallic Pt (at 65 °C) onto chemically reduced (by CaH<sub>2</sub>) TNTs (resulting in bTNTs), chemically etched (HCl + NaF) Ti felts and grinded Ti foils. All Pt/Ti-based electrodes prepared by this method showed enhanced intrinsic catalytic activity towards MOR when compared to Pt and other Pt/Ti-based catalysts. The very high/high mass specific activity of Pt/bTNTs (ca 700 mA mg<sub>Pt</sub><sup>−1</sup> at the voltammetric peak of 5 mV s<sup>−1</sup> in 0.5 M MeOH) and of Pt/Ti-felt (ca 60 mA mg<sub>Pt</sub><sup>−1</sup>, accordingly) make these electrodes good candidates for MOR anodes and/or reactive Gas Diffusion Layer Electrodes (GDLEs) in DMFCs and/or methanol electrolysis cells.https://www.mdpi.com/1420-3049/27/19/6382methanol oxidationgalvanic depositiontitaniumtitania nanotubesblack titania |
| spellingShingle | Aikaterini Touni Xin Liu Xiaolan Kang Chrysanthi Papoulia Eleni Pavlidou Dimitra Lambropoulou Mihalis N. Tsampas Athanasios Chatzitakis Sotiris Sotiropoulos Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes Molecules methanol oxidation galvanic deposition titanium titania nanotubes black titania |
| title | Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes |
| title_full | Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes |
| title_fullStr | Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes |
| title_full_unstemmed | Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes |
| title_short | Methanol Oxidation at Platinum Coated Black Titania Nanotubes and Titanium Felt Electrodes |
| title_sort | methanol oxidation at platinum coated black titania nanotubes and titanium felt electrodes |
| topic | methanol oxidation galvanic deposition titanium titania nanotubes black titania |
| url | https://www.mdpi.com/1420-3049/27/19/6382 |
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