Direct Synthesis of Hydrogen Peroxide from H2 and O2 Using Al2O3 Supported Au−Pd Catalysts
| Autor: | Christopher J. Kiely, Graham J. Hutchings, Jennifer K. Edwards, Albert Frederick Carley, Benjamín Solsona, Philip Landon, Andrew A. Herzing |
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| Rok vydání: | 2006 |
| Předmět: |
inorganic chemicals
organic chemicals General Chemical Engineering General Chemistry Microstructure Hydrogen peroxide synthesis Catalysis chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Transmission electron microscopy Materials Chemistry heterocyclic compounds Metal catalyst Hydrogen peroxide Nuclear chemistry |
| Zdroj: | Chemistry of Materials. 18:2689-2695 |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | The direct synthesis of hydrogen peroxide from H2 and O2 using a range of alumina supported Au, Pd, and Au−Pd metal catalysts is described and discussed in detail for both fresh catalysts and materials that have been aged in storage. The conditions previously identified as being optimal for hydrogen peroxide synthesis (i.e., low temperatures (2 °C) and short reaction residence times) are employed, and the effect of catalyst composition and preparation was investigated in detail for the fresh catalysts. The addition of Pd to the Au catalyst increases the rate of hydrogen peroxide synthesis as well as the concentration of hydrogen peroxide formed. Interestingly, the addition of relatively small amounts of Pd to the Au/Al2O3 catalyst, replacing up to 20% of the Au, significantly increases the formation of hydrogen peroxide. The microstructure of the catalysts was studied using transmission electron microscopy and X-ray photoelectron spectroscopy for both the fresh and the aged catalyst, and the supported bim... |
| Databáze: | OpenAIRE |
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