Direct synthesis of hydrogen peroxide using Au-Pd-exchanged and supported heteropolyacid catalysts at ambient temperature using water as solvent

Ntainjua, Edwin, Piccinini, Marco ORCID: https://orcid.org/0000-0002-8479-4164, Freakley, Simon J., Pritchard, James Charles, Edwards, Jennifer Kelly ORCID: https://orcid.org/0000-0003-4089-2827, Carley, Albert Frederick and Hutchings, Graham John ORCID: https://orcid.org/0000-0001-8885-1560 2012. Direct synthesis of hydrogen peroxide using Au-Pd-exchanged and supported heteropolyacid catalysts at ambient temperature using water as solvent. Green Chemistry 14 (1) , pp. 170-181. 10.1039/c1gc15863e

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Abstract

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 H(2)O(2). In order for the direct process to compete with the anthraquinone process, there is a need for enhanced H(2)O(2) 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 H(2)O(2) yields in the absence of acid or halide additives than previously reported catalysts. The Au-Pd-exchanged Cs-heteropolyacid catalysts also show superior H(2)O(2) synthesis activity under challenging conditions (ambient temperature, water-only solvent and CO(2)-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(2)O(2).

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Subjects:	Q Science > QD Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	1463-9262
Last Modified:	05 Aug 2023 01:30
URI:	https://orca.cardiff.ac.uk/id/eprint/26042

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