Direct synthesis of hydrogen peroxide from hydrogen and oxygen over insoluble Pd0.15M2.5H0.2PW12O40 (M=K, Rb, and Cs) heteropolyacid catalysts

Direct synthesis of hydrogen peroxide from hydrogen and oxygen over insoluble... Palladium-containing insoluble heteropolyacid (HPA) catalysts (Pd0.15M2.5H0.2PW12O40) were prepared by an ion-exchange method using various alkaline metal ions (M = K+, Rb+, and Cs+) (denoted as Pd-KPW, Pd-RbPW, and Pd-CsPW). They were then applied to the direct synthesis of hydrogen peroxide from hydrogen and oxygen. Conversion of hydrogen over the catalysts was almost identical with no great difference, while selectivity for hydrogen peroxide increased in the order of Pd-KPW < Pd-RbPW < Pd-CsPW. As a consequence, yield for hydrogen peroxide increased in the order of Pd-KPW < Pd-RbPW < Pd-CsPW. It was found that yield for hydrogen peroxide increased with increasing Pd 3d5/2 binding energy of the catalyst. Among the catalysts tested, Pd-CsPW catalyst with the highest Pd 3d5/2 binding energy showed the highest yield for hydrogen peroxide. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Direct synthesis of hydrogen peroxide from hydrogen and oxygen over insoluble Pd0.15M2.5H0.2PW12O40 (M=K, Rb, and Cs) heteropolyacid catalysts

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Publisher
Springer Netherlands
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-010-0199-1
Publisher site
See Article on Publisher Site

Abstract

Palladium-containing insoluble heteropolyacid (HPA) catalysts (Pd0.15M2.5H0.2PW12O40) were prepared by an ion-exchange method using various alkaline metal ions (M = K+, Rb+, and Cs+) (denoted as Pd-KPW, Pd-RbPW, and Pd-CsPW). They were then applied to the direct synthesis of hydrogen peroxide from hydrogen and oxygen. Conversion of hydrogen over the catalysts was almost identical with no great difference, while selectivity for hydrogen peroxide increased in the order of Pd-KPW < Pd-RbPW < Pd-CsPW. As a consequence, yield for hydrogen peroxide increased in the order of Pd-KPW < Pd-RbPW < Pd-CsPW. It was found that yield for hydrogen peroxide increased with increasing Pd 3d5/2 binding energy of the catalyst. Among the catalysts tested, Pd-CsPW catalyst with the highest Pd 3d5/2 binding energy showed the highest yield for hydrogen peroxide.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 9, 2010

References

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