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Reduction of oxygen by hydroxylammonium salt or hydroxylamine over supported Au nanoparticles for in situ generation of hydrogen peroxide in aqueous or non-aqueous medium

Paper ID Volume ID Publish Year Pages File Format Full-Text
53120 46911 2007 6 PDF Available
Title
Reduction of oxygen by hydroxylammonium salt or hydroxylamine over supported Au nanoparticles for in situ generation of hydrogen peroxide in aqueous or non-aqueous medium
Abstract

Reaction of O2 with hydroxylamine or its salts over a number of supported gold catalysts containing Au nanoparticles (at 10–70 °C) has been studied at atmospheric pressure for the in situ generation of H2O2 (required for organic oxidation reactions in the synthesis of fine/specialty chemicals) in aqueous (water) or non-aqueous medium. Hydrogen peroxide in high yields with harmless by-products (viz. water and nitrogen) can be generated in situ by the reduction of O2 by hydroxylammonium sulfate (or chloride) or hydroxylamine using the supported gold catalysts particularly Au/Gd2O3, Au/La2O3 and Au/MgO, in aqueous (water) or non-aqueous (viz. methanol) medium at close to ambient conditions. The reduction of O2 by hydroxylammonium salt to H2O2, however, requires preneutralization of the salt by alkali; in the absence of the neutralization, only water is formed in the reaction.

Keywords
In situ H2O2 generation; Hydrogen peroxide; Hydroxylammonium salts; Hydroxylamine; Au nanoparticles; Au/MgO; Au/La2O3; Au/Gd2O3
First Page Preview
Reduction of oxygen by hydroxylammonium salt or hydroxylamine over supported Au nanoparticles for in situ generation of hydrogen peroxide in aqueous or non-aqueous medium
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 5, May 2007, Pages 811–816
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis