In situ redox strategy for large-scale fabrication of surfactant-free M-Fe2O3 (M = Pt, Pd, Au) hybrid nanospheres
| Autor: | Wang Li, Yu Zhang, Dapeng Liu, Xi lan Feng |
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| Rok vydání: | 2016 |
| Předmět: |
In situ
Aqueous solution Fabrication Materials science Surfactant free Inorganic chemistry Nanoparticle 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox 0104 chemical sciences Catalysis engineering General Materials Science Noble metal 0210 nano-technology |
| Zdroj: | Science China Materials. 59:191-199 |
| ISSN: | 2199-4501 2095-8226 |
| Popis: | A facile in situ redox strategy has been developed to fabricate surfactant-free M-Fe2O3 (M=Pt, Pd, Au) hybrid nanospheres. In this process, noble metal salts were directly reduced by the pre-prepared Fe3O4 components in an alkaline aqueous solution without using organic reductants and surfactants. During the redox reaction, Fe3O4 was oxidized into Fe2O3, and the reduzates of noble metal nanoparticles were deposited on the surface of the Fe2O3 nanospheres. Then the characterizations were discussed in detail to study the formation of M-Fe2O3 hybrids. At last, catalytic CO oxidation was selected as a model reaction to evaluate the catalytic performance of these samples. It demonstrates that Pt-Fe2O3 nanospheres can catalyze 100% conversion of CO into CO2 at 90℃, indicating superior activity relative to Pd-Fe2O3 and Au-Fe2O3. |
| Databáze: | OpenAIRE |
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