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Licensed Unlicensed Requires Authentication Published by De Gruyter May 8, 2013

Reaction Kinetics of the Heterogenous Decomposition of Hydrogen Peroxide in Microemulsions

Reaktionskinetik des heterogenen Zerfalls von Wasserstoffperoxid in Mikroemulsionen
  • Yousef Nadia , Khaled M. El-Sousy , Hisham J. Y. EL-Aila and Fatheya Mhesen


Kinetic study for the heterogeneous decomposition of hydrogen peroxide over different non-soluble metal oxides (CuO, Fe2O3 and PbO2) was taken as a model reaction, mainly in normal micellar, inverse micellar microemulsion of sodium dodecyl sulfate (SDS). Other micellar phases of different surfactants [sodium dioctylsulfosuccinate (AOT), cetyle trimethyl ammonium bromide (CTAB) and triton X100] have been studied. Different organic solvents have been investigated. A promotional effect was generally observed. The reaction rate determining step was estimated. Reaction rate constants and thermodynamic parameters (ΔG*, ΔH* and ΔS*) were calculated. It was found that the highest promotional influence was observed in the case of (SDS/Fe3O4) in micellar and inverse micellar micro-emulsion media.


Die Untersuchung der Kinetik des heterogenen Zerfalls von Wasserstoffperoxid über verschiedene nichtlösliche Metalloxide (CuO, Fe2O3 and PbO2) wurde hauptsächlich in normalen mizellaren und inversmizellaren Mikroemulsionen von Natriumdodecylsulfat (SDS) als Modellreaktion genommen. Andere mizellaren Phasen von verschiedenen Tensiden [Natriumdioctylsulfosuccinat (AOT), Cetyl-trimethylammoniumbromid (CTAB) und Triton X100] sind in verschiedenen organischen Lösungsmitteln untersucht worden. Allgemein wurde ein fördernder Effekt beobachtet. Die Geschwindigkeit des reaktionsbestimmenden Schrittes wurde abgeschätzt und die Reaktionsgeschwindigkeitskonstante sowie die thermodynamischen Parameter (ΔG*, ΔH* and ΔS*) berechnet. Der höchste fördernde Einfluss wurde im Fall von (SDS/Fe3O4) in mizellarem und inversmizellarem Mikroemulsionsmedium gefunden.

* E- mail: ; P.O. Box 4051 Fax: +0 09 72-08-2 84 54 88
3Dr. Hisham J. Y. EL-Aila, Department of Chemistry, Al-Aqsa University, Gaza, PNA Via Israel, P.O. Box 40 51, Fax: +0 0972-08-2 84 54 88, E-mail:

Prof. Dr. Yousef Nadia is professor of physical chemistry in Ain-shams University, Cario (Egypt), has many publication in different fields of physical chemistry.

Dr. Khaled M. El-Sousy born in 1962, studied at Islamic University-Gaza (Palestine), where he obtained his B. Sc in chemistry in 1985 and his M. Sc in physical chemistry from Middle East Technical University (Tyrky)in 1988. In 2000 he obtained his Ph. D in physical chemistry from Ain-Shams University, Cairo (Egypt). Since he has been Assistant professor in chemistry department at Al-Aqsa University-Gaza, (Palestine).

Dr. Hesham J. Y. El-Aila born in 1963, studied at Islamic University-Gaza (Palestine), where he obtained his B. Sc in chemistry in 1986 and at Al-Nagah University-Nablus (Palestine), where he obtained his M. Sc. in physical chemistry in 1989. In 2001 he obtained his Ph. D in physical chemistry from Ain- Shams University, Cairo (Egypt). Since he has been Assistant professor in chemistry department at Al-Aqsa University-Gaza, (Palestine).

Mrs. Fatheya Mhesen, M. Sc. student in physical chemistry in Al-Aqsa University-Gaza, (Palestine).


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Received: 2005-5-7
Published Online: 2013-05-08
Published in Print: 2005-12-01

© 2005, Carl Hanser Publisher, Munich

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