Journal
GREEN CHEMISTRY
Volume 14, Issue 1, Pages 170-181Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1gc15863e
Keywords
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Funding
- EPSRC
- EPSRC [EP/I006060/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I006060/1] Funding Source: researchfish
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The direct synthesis of hydrogen peroxide from molecular H-2 and O-2 represents a green and economic alternative to the current anthraquinone process used for the industrial production of H2O2. In order for the direct process to compete with the anthraquinone process, there is a need for enhanced H2O2 yields and H-2 selectivity in the process. We show that Au-Pd-exchanged and supported Cs-containing heteropolyacid catalysts with the Keggin structure are considerably more effective in achieving high H2O2 yields in the absence of acid or halide additives than previously reported catalysts. The Au-Pd-exchanged Cs-heteropolyacid catalysts also show superior H2O2 synthesis activity under challenging conditions (ambient temperature, water-only solvent and CO2-free reaction gas). Au plays a crucial role in achieving the improved performance of these heteropolyacid-based catalysts. The heteropolyacid limits the subsequential hydrogenation/decomposition of H2O2.
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