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Direct synthesis of hydrogen peroxide using Au–Pd-exchanged and supported heteropolyacid catalysts at ambient temperature using water as solvent.
- Source :
- Green Chemistry; 2012, Vol. 14 Issue 1, p170-181, 12p
- Publication Year :
- 2012
-
Abstract
- The direct synthesis of hydrogen peroxide from molecular H<subscript>2</subscript> and O<subscript>2</subscript> represents a green and economic alternative to the current anthraquinone process used for the industrial production of H<subscript>2</subscript>O<subscript>2</subscript>. In order for the direct process to compete with the anthraquinone process, there is a need for enhanced H<subscript>2</subscript>O<subscript>2</subscript> yields and H<subscript>2</subscript> 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 H<subscript>2</subscript>O<subscript>2</subscript> yields in the absence of acid or halide additives than previously reported catalysts. The Au–Pd-exchanged Cs-heteropolyacid catalysts also show superior H<subscript>2</subscript>O<subscript>2</subscript> synthesis activity under challenging conditions (ambient temperature, water-only solvent and CO<subscript>2</subscript>-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 H<subscript>2</subscript>O<subscript>2</subscript>. [ABSTRACT FROM AUTHOR]
- Subjects :
- HYDROGEN peroxide synthesis
GOLD
PALLADIUM
CATALYSTS
WATER
SOLVENTS
ANTHRAQUINONES
Subjects
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 14
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100867206
- Full Text :
- https://doi.org/10.1039/c1gc15863e