The Direct Synthesis of Hydrogen Peroxide Using Platinum-Promoted Gold-Palladium Catalysts

The direct synthesis of hydrogen peroxide offers a potentially green route to the production of this important commodity chemical. Early studies showed that Pd is a suitable catalyst, but recent work indicated that the addition of Au enhances the activity and selectivity significantly. The addition...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2014-02, Vol.53 (9), p.2381-2384
Main Authors: Edwards, Jennifer K., Pritchard, James, Lu, Li, Piccinini, Marco, Shaw, Greg, Carley, Albert F., Morgan, David J., Kiely, Christopher J., Hutchings, Graham J.
Format: Article
Language:English
Subjects:
alloys
Catalysis
Catalysts
Commodities
Gold
Hydrogen peroxide
hydrogenation
nanoparticles
Palladium
Platinum
Productivity
supported catalysts
Synthesis
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Summary:The direct synthesis of hydrogen peroxide offers a potentially green route to the production of this important commodity chemical. Early studies showed that Pd is a suitable catalyst, but recent work indicated that the addition of Au enhances the activity and selectivity significantly. The addition of a third metal using impregnation as a facile preparation method was thus investigated. The addition of a small amount of Pt to a CeO2‐supported AuPd (weight ratio of 1:1) catalyst significantly enhanced the activity in the direct synthesis of H2O2 and decreased the non‐desired over‐hydrogenation and decomposition reactions. The addition of Pt to the AuPd nanoparticles influenced the surface composition, thus leading to the marked effects that were observed on the catalytic formation of hydrogen peroxide. In addition, an experimental approach that can help to identify the optimal nominal ternary alloy compositions for this reaction is demonstrated. Small change with great effect: The addition of a small amount of Pt to a AuPd/CeO2 catalyst can significantly enhance its performance in the direct synthesis of H2O2. The contour diagram shows the productivity of catalysts with different metal ratios (blue/yellow: low/high productivity).
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201308067