Photocatalytic hydrogen production using TiO2–Pt aerogels
| Autor: | Zsolt Pap, Jarmila Puskelova, Kovacs Gabor, Adriana Vulpoi, Maria Antoniadou, Virginia Danciu, Lucian Baia, Vassilios Dracopoulos, Monica Baia, Elias Stathatos, Panagiotis Lianos |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Ethanol Annealing (metallurgy) General Chemical Engineering Supercritical drying Inorganic chemistry Aerogel General Chemistry Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound Colloid chemistry Chemical engineering law Photocatalysis Environmental Chemistry Calcination Hydrogen production |
| Zdroj: | Chemical Engineering Journal. 242:96-101 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2013.12.018 |
| Popis: | TiO 2 –Pt aerogel composites have been synthesized by mixing sol–gel titania with Pt colloidal suspensions followed by supercritical drying. The highest specific surface achieved with these materials ranged between 550 and 600 m 2 g −1 before annealing and stayed relatively high, i.e. 162 m 2 g −1 , after calcination. The concentration of Pt nanoparticles ranged between 0.3 and 1.0 wt.% while their size ranged between 5.75 and 6.5 nm. These composites were employed as photocatalysts for room-temperature photocatalytic reforming of ethanol and hydrogen production. The highest hydrogen production rate, 7.2 mmol H 2 h −1 g −1 , was obtained in the case of the smallest and most concentrated metal nanoparticles underlying the importance of the number of active sites on the TiO 2 –Pt composites. This rate of hydrogen production is relatively high and reflects the relatively high specific surface of the employed photocatalysts. |
| Databáze: | OpenAIRE |
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