Hydrogen generation from ammonia borane by chemically dealloyed platinum nanoparticles
| Autor: | Levent Semiz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
010405 organic chemistry Nanoporous Ammonia borane chemistry.chemical_element Activation energy 010402 general chemistry Platinum nanoparticles 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Sodium hydroxide Physical and Theoretical Chemistry Platinum Hydrogen production |
| Zdroj: | Reaction Kinetics, Mechanisms and Catalysis. 129:205-218 |
| ISSN: | 1878-5204 1878-5190 |
| DOI: | 10.1007/s11144-019-01700-y |
| Popis: | In this study, platinum catalysts were prepared from cosputtered platinum-aluminum alloys by dealloying method and utilized in hydrogen generation from ammonia borane. Aluminum was selectively removed from the alloy by sodium hydroxide. The resultant platinum particles obtained after dealloying was found to have nanoporous structure. The effect of Al sputtering power on hydrogen generation performance of particles was evaluated. The catalysts were characterized by SEM, TEM, and Zeta-Sizer. The maximum hydrogen generation rate of the catalysts was measured as 82.8 (± 2.2) L H2 min−1 g−1catalyst. The effect of catalyst amount was also evaluated. The activation energy of the reaction was calculated as 20.4 (± 0.8) kJ mol−1. Furthermore, the catalysts could preserve their catalytic activity upon consecutive runs with effective washing steps. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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