Tuning the Core–Shell Structure of Au144@Fe2O3 for Optimal Catalytic Activity for CO Oxidation
| Autor: | Chengcheng Tian, Guo Shiou Foo, Harry M. Meyer, Sheng Dai, Michelle Lukosi, Shannon M. Mahurin, Xinyi Li |
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| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Iron oxide Shell (structure) 02 engineering and technology General Chemistry Thermal treatment 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences law.invention chemistry.chemical_compound Colloid Chemical engineering law Calcination 0210 nano-technology Layer (electronics) Deposition (law) |
| Zdroj: | Catalysis Letters. 148:2315-2324 |
| ISSN: | 1572-879X 1011-372X |
| Popis: | Core–shell heterostructures have been utilized as a catalyst that is thermally stable and exhibits a synergistic effect between core and shell, resulting in increased catalytic activity. Here we report on the synthetic procedure involving a Au144 core with an iron oxide shell which can be varied in thickness. The Au144@Fe2O3 particles with Au:Fe mass ratios of 1:2, 1:4, and 1:6 were synthesized and then deposited onto silica via colloidal deposition. Using CO oxidation, each Au144@Fe2O3/SiO2 catalyst gave varying degrees of full CO conversion depending on the thickness of the iron oxide layer. The 1:4 Au144@Fe2O3/SiO2 catalyst produced the best catalytic activity and was further investigated via thermal treatments, where calcination at 300 °C presented the best results, and the 1:4 ratio was still active at 100 °C after thermal treatments. |
| Databáze: | OpenAIRE |
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