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

页码：934 / 940

页数：7

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