The Effect of Carbon Content on Methanol Oxidation and Photo-Oxidation at Pt-TiO2-C Electrodes
| Autor: | A. Papaderakis, Sotiris Sotiropoulos, Jenia Georgieva, Olga Niki Spyridou, Angeliki Banti, N. Karanasios, N. Dimitrova, Stephan Armyanov, Aikaterini Touni, Eugenia Valova |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element methanol oxidation 02 engineering and technology 010402 general chemistry Electrocatalyst lcsh:Chemical technology 01 natural sciences Catalysis lcsh:Chemistry chemistry.chemical_compound Adsorption electrocatalysis lcsh:TP1-1185 platinum Physical and Theoretical Chemistry titanium dioxide 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry lcsh:QD1-999 Titanium dioxide Photocatalysis Methanol 0210 nano-technology Platinum Carbon photocatalysis |
| Zdroj: | Catalysts, Vol 10, Iss 2, p 248 (2020) Catalysts Volume 10 Issue 2 |
| ISSN: | 2073-4344 |
| Popis: | The oxidation of methanol is studied at TiO2-supported Pt electrodes of varied high surface area carbon content (in the 30-5% w/w range) and C÷Ti atom ratio (in the 3.0-0.4 ratio). The Pt-TiO2 catalyst is prepared by a photo-deposition process and C nanoparticles (Vulcan XC72R) are added by simple ultrasonic mixing. The optimum C÷Ti atom ratio of the prepared catalyst for methanol electro-oxidation is found to be 1.5, resulting from the interplay of C properties (increased electronic conductivity and methanol adsorption), those of TiO2 (synergistic effect on Pt and photo-activity), as well as the catalyst film thickness. The intrinsic catalytic activity of the best Pt-TiO2/C catalyst is better than that of a commercial Pt/C catalyst and could be further improved by nearly 25% upon UV illumination, whose periodic application can also limit current deterioration. |
| Databáze: | OpenAIRE |
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