In situ facile synthesis of ruthenium nanocluster catalyst supported on carbon black for hydrogen generation from the hydrolysis of ammonia-borane
| Autor: | Stefano Desinan, Hongyan Liang, Dongling Ma, Renzo Rosei, Federico Rosei, Guozhu Chen |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Inorganic chemistry Ammonia borane Energy Engineering and Power Technology chemistry.chemical_element Carbon black Activation energy Condensed Matter Physics Nanoclusters Catalysis Ruthenium chemistry.chemical_compound Hydrolysis Fuel Technology chemistry Hydrogen production |
| Zdroj: | International Journal of Hydrogen Energy. 37:17921-17927 |
| ISSN: | 0360-3199 |
| Popis: | Ligand-free Ru nanoclusters supported on carbon black have been synthesized in situ for the first time from the reduction of RuCl 3 by ammonia-borane concomitantly with its hydrolysis process at room temperature, and their catalytic activity has been investigated. Well dispersed Ru nanoclusters (∼1.7 nm) are stabilized and immobilized by carbon black. Due to the small size and the absence of ligands on the surface, the Ru catalysts exhibit high catalytic activity, which is partly retained after 5 reaction cycles. A kinetic study shows that the catalytic hydrolysis of ammonia-borane is first order with respect to Ru catalyst concentration; the turnover frequency is 429.5 mol H 2 min −1 mol −1 Ru. The activation energy for the hydrolysis of ammonia-borane in the presence of Ru/C catalysts has been measured to be 34.81 ± 0.12 kJ mol −1 , which is smaller than most of the values reported for other catalysts, including those based on Ru, for the same reaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect