Promoted activity of annealed Rh nanoclusters on thin films of Al2O3/NiAl(100) in the dehydrogenation of Methanol-d4
| Autor: | Meng Fan Luo, Ting-Wei Liao, Yao Jane Hsu, Ting Chieh Hung, Chia Hsin Wang, Po Wei Hsu, Yu Ling Lai, Guan Jr Liao, Yaw Wen Yang, Jeng Han Wang, Zhen He Liao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nial
Materials science General Chemical Engineering 02 engineering and technology General Chemistry Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Decomposition 0104 chemical sciences Nanoclusters Catalysis Crystallography Reactivity (chemistry) Dehydrogenation Thin film 0210 nano-technology computer computer.programming_language |
| Zdroj: | RSC Advances. 11:24762-24771 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/d1ra04066a |
| Popis: | Annealed Rh nanoclusters on an ordered thin film of Al2O3/NiAl(100) were shown to exhibit a promoted reactivity toward the decomposition of methanol-d4, under both ultrahigh vacuum and near-ambient-pressure conditions. The Rh clusters were grown with vapor deposition onto the Al2O3/NiAl(100) surface at 300 K and annealed to 700 K. The decomposition of methanol-d4 proceeded only through dehydrogenation, with CO and deuterium as products, on Rh clusters both as prepared and annealed. Nevertheless, the catalytic reactivity of the annealed clusters, measured with the production of either CO or deuterium per surface Rh site from the reaction, became at least 2–3 times that of the as-prepared ones. The promoted reactivity results from an altered support effect associated with an annealing-induced mass transport at the surface. Our results demonstrate a possibility to practically prepare reactive Rh clusters, regardless of the cluster size, that can tolerate an elevated reaction temperature, with no decreased reactivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|