Effect of Pt Loading Order on Photocatalytic Activity of Pt/TiO2 Nanofiber in Generation of H2 from Neat Ethanol
| Autor: | Chun Hsuan Liu, Jiunn Hsing Chao, Chih Wei Liu, Chiu Hsun Lin, Feng Chieh Wang |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Hydrogen chemistry.chemical_element Nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis law.invention Crystallinity General Energy chemistry Chemical engineering law Yield (chemistry) Nanofiber Photocatalysis Calcination Dehydrogenation Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry C. 113:13832-13840 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | TiO2 nanofibers that are loaded with 1 wt % Pt metal that is introduced at different stages of the wet impregnation procedure have very different photocatalytic activities. Two photocatalysts prepared using different procedures were denoted as PtHTN and PtB catalysts. The former was prepared by impregnating hydrogen trititanate nanofibers (H2Ti3O7, abbreviated as HTN) directly with H2PtCl6, before calcining between 573 and 873 K and then reducing at 423 K in flowing hydrogen. The latter was prepared by initially calcining HTN nanofiber between 573 and 873 K to yield TiO2 nanofiber, and then impregnating this TiO2 support with H2PtCl6; the support was then calcined and reduced as PtHTN to produce PtB catalysts. Although most of their physical properties such as surface area, pore volume, crystalline phase composition and crystallinity, capability to absorb UV light, and band gap energy are quite similar, the optimized H2 yield over PtB catalyst in the photocatalytic dehydrogenation of neat ethanol was 1.86... |
| Databáze: | OpenAIRE |
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