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.
CatalystEA, kJ/mol
none75
MnO258
I-56
colloidal Pt49
liver catalase23

Author: Fred Senese senese@antoine.frostburg.edu


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