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Kinetics of hydrogen peroxide decomposition over Pd/SiO 2 catalyst was investigated as part of a larger project to determine the overall kinetics of hydrogen peroxide formation by Pd/SiO 2 catalyzed direct combination of hydrogen and oxygen. A Pd oxidative/reductive cycle mechanism for the decomposition of H 2 O 2 over Pd/ SiO 2 was proposed. A Rideal-Eley rate expression based on this mechanism was shown to accurately correlate experimental data over a wide range of H 2 O 2 concentration and temperature. This rate equation was shown to also apply in the presence of stabilizing concentrations of H 2 SO 4 .

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