Where can we find the activation energy for catalyzed decomposition of hydrogen peroxide?

We are finishing up a lab investigating the kinetics of H₂O₂ decomposition through catalysis with pyrolusite (a mineral containing MnO₂). We looked at rate as a function of temp to determine the activation energy via Arrhenius's equation. Our values here vary wildly. Could you suggest a source for this information?
Hiroaki Oyaizu, Saint James School

The H₂O₂ decomposition reaction has been studied for many years; you'll find detailed information about it in the literature or in kinetics chapters of many general and physical chemistry texts.

Activation energy for the decomposition of H₂O₂, adapted from Physical Chemistry by E. A. Moelwyn-Hughes.

Catalyst	EA, kJ/mol
none	75
MnO2	58
I-	56
colloidal Pt	49
liver catalase	23

Author: Fred Senese senese@antoine.frostburg.edu

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 07/31/07.URL: http://antoine.frostburg.edu/chem/senese/101/kinetics/faq/Ea-catalyzed-h2o2-decomposition.shtml