γ-Alumina-supported Pt17 cluster: controlled loading, geometrical structure, and size-specific catalytic activity for carbon monoxide and propylene oxidation
| Autor: | Kosuke Wakamatsu, Nobuyuki Shimizu, Seiji Yamazoe, Wataru Kurashige, Dogan Ozkaya, Tokuhisa Kawawaki, Yuichi Negishi, Sakiat Hossain, Atsuya Harasawa, Ryo Kaneko, Shuhei Nagaoka, Manfred Erwin Schuster, Kanako Funai |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Chemical substance
Materials science Oxide Bioengineering 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences law.invention Catalysis chemistry.chemical_compound Magazine law Cluster (physics) General Materials Science General Engineering General Chemistry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Chemical engineering chemistry engineering Noble metal 0210 nano-technology Science technology and society Carbon monoxide |
| Zdroj: | Nanoscale Advances. 2:669-678 |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/c9na00579j |
| Popis: | Although Pt is extensively used as a catalyst to purify automotive exhaust gas, it is desirable to reduce Pt consumption through size reduction because Pt is a rare element and an expensive noble metal. In this study, we successfully loaded a Pt17 cluster on γ-alumina (γ-Al2O3) (Pt17/γ-Al2O3) using [Pt17(CO)12(PPh3)8]Cln (n = 1, 2) as a precursor. In addition, we demonstrated that Pt is not present in the form of an oxide in Pt17/γ-Al2O3 but instead has a framework structure as a metal cluster. Moreover, we revealed that Pt17/γ-Al2O3 exhibits higher catalytic activity for carbon monoxide and propylene oxidation than γ-Al2O3-supported larger Pt nanoparticles (PtNP/γ-Al2O3) prepared using the conventional impregnation method. Recently, our group discovered a simple method for synthesizing the precursor [Pt17(CO)12(PPh3)8]Cln. Furthermore, Pt17 is a Pt cluster within the size range associated with high catalytic activity. By combining our established synthesis and loading methods, other groups can conduct further research on Pt17/γ-Al2O3 to explore its catalytic activities in greater depth. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|