2011•Latin American Applied Research - An international journalRequires access
Influence of catalyst treatments on the decomposition of hydrogen peroxide on supported palladium catalysts
Fernando Augusto Pedersen Voll, Fernando Palú, J.B.O. Santos
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Abstract
The decomposition of hydrogen pe- roxide was studied on Pd catalysts between 293 K and 313 K. The apparent activation energy value was calculated for all the catalysts and it varied be- tween 27 and 55 kJ/mol. For all the catalysts tested, treatment with hydrogen resulted in a significant increase in the reaction rate, as well as a decrease in the apparent activation energy for the reaction. All the reactions were well represented by a first order rate law with respect to H2O2. The effect of the treatment with H2O2 was studied in successive reac- tions without catalyst exchange. A small deactivation was observed in the 5.0% Pd/AC and 0.5% Pd/AC catalysts after four H2O2 decomposition reactions.