Artículos de revistas
Kinetic study of the decomposition of hydrogen peroxide catalysed by Co(II) acetylacetonate supported on a silica-propylpiperazine matrix
Registration in:
Colloids And Surfaces A-physicochemical And Engineering Aspects. Elsevier Science Bv, v. 136, n. 41671, n. 151, n. 154, 1998.
0927-7757
WOS:000073409900015
10.1016/S0927-7757(97)00318-X
Author
Oliveira, SF
Espinola, JGP
Lemus, WES
de Souza, AG
Airoldi, C
Institutions
Abstract
The catalytic decomposition of hydrogen peroxide by Co(II)acetylacetonate supported on a propylpiperazine-silica matrix (Co(II)(acac)-PPS) was studied in aqueous media. The results showed that the reaction was first order in H2O2. It was found that the reaction rate was pH dependent with a maximum at around pH = 8. Activation parameters were determined in the temperature range 30-45 degrees C. The low value obtained for the activation energy is in accordance with the proposed free-radical mechanism. (C) 1998 Elsevier Science B.V. 136 41671 151 154