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Switching off hydrogen peroxide hydrogenation in the direct synthesis process

Edwards, Jennifer Kelly ORCID:, Solsona, Benjamin, Ntainjua Ndifor, Edwin, Carley, Albert Frederick, Herzing, Andrew A., Kiely, Christopher John ORCID: and Hutchings, Graham John ORCID: 2009. Switching off hydrogen peroxide hydrogenation in the direct synthesis process. Science 323 (5917) , pp. 1037-1041. 10.1126/science.1168980

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Hydrogen peroxide (H2O2) is an important disinfectant and bleach and is currently manufactured from an indirect process involving sequential hydrogenation/oxidation of anthaquinones. However, a direct process in which H2 and O2 are reacted would be preferable. Unfortunately, catalysts for the direct synthesis of H2O2 are also effective for its subsequent decomposition, and this has limited their development. We show that acid pretreatment of a carbon support for gold-palladium alloy catalysts switches off the decomposition of H2O2. This treatment decreases the size of the alloy nanoparticles, and these smaller nanoparticles presumably decorate and inhibit the sites for the decomposition reaction. Hence, when used in the direct synthesis of H2O2, the acid-pretreated catalysts give high yields of H2O2 with hydrogen selectivities greater than 95%.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: American Association for the Advancement of Science
ISSN: 0036-8075
Last Modified: 02 Oct 2023 06:28

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