Influence of hematite morphology on the CO oxidation performance of Au/α-Fe2O3
| Autor: | Peng Wang, Emiel J. M. Hensen, Long Zhang, Shaojie Li, Yanan Gao, Fu-Kuo Chiang |
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| Přispěvatelé: | Inorganic Materials & Catalysis, EIRES Chem. for Sustainable Energy Systems |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Morphology
Morphology (linguistics) Materials science Hematite 02 engineering and technology General Medicine Oxidation Activity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences CO oxidation 0104 chemical sciences Catalysis Chemical engineering Colloidal gold visual_art visual_art.visual_art_medium Nanorod Particle size Gold Nanoparticle deposition 0210 nano-technology Stability |
| Zdroj: | Chinese Journal of Catalysis, 42(4), 658-665. Science Press |
| ISSN: | 1872-2067 |
| Popis: | Controlling the interaction between metal nanoparticles and the support is a means to tune catalytic activity and stability. Herein we investigated the influence of the morphology of hematite on the performance of gold for CO oxidation. Nanosphere and nanorod forms of hematite, α-Fe2O3(S) and α-Fe2O3(R) respectively, were used to support gold nanoparticles. The surface of α-Fe2O3(R) was more corrugated than that of α-Fe2O3(S). These defects provide anchoring sites for gold nanoparticle deposition and stabilization. Due to the stronger gold-support interactions, Au/α-Fe2O3(R) contained smaller and more hemispherical gold particles than Au/α-Fe2O3(S). Au/α-Fe2O3(R) was not only more active in CO oxidation but also much more stable as evident from the small change in gold particle size during reaction. The higher reducibility of Au/α-Fe2O3(R) also contributed to the higher CO oxidation activity. |
| Databáze: | OpenAIRE |
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