The activation characteristics of the decomposition of H2O2 on palladium-carbon catalysts

被引：10
|
作者：
Lapko, V. F. [1 ]
Gerasimyuk, I. P. [1 ]
Kuts', V. S. [1 ]
Tarasenko, Yu. A. [1 ]
机构：
[1] Natl Acad Sci Ukraine, Inst Sorpt & Problems Endoecol, Kiev, Ukraine
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2010年 / 84卷 / 06期
关键词：
Palladium; Carbon Matrix; Quantum Chemical Study; Catalytic Decomposition; Electron Density Transfer;
D O I：
10.1134/S0036024410060087
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The kinetics of catalytic decomposition of H2O2 on palladium-carbon catalysts with various deposited metal distributions in carrier (active carbon) porous granules was studied. The activation parameters (E (a) and A (0)) of the process were calculated by the Arrhenius equation. A determining factor for the catalytic process was found to be the entropy factor (A (0)), which characterized the formation and dissociation of activated transition complexes. A quantum-chemical study of the electronic structure of palladium-carbon catalysts showed the occurrence of electron density transfer from the carbon matrix to metal clusters and collectivization of their electronic systems. This increased the donor-acceptor ability of the synthesized materials and, as a consequence, their catalytic activity.
引用
收藏
页码：934 / 940
页数：7
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