Formation and the nature of activity of Ziegler systems based on palladium β-diketonate complexes in hydrogenation catalysis

被引：22

作者：

Belykh, L. B. ^{[1
]}

Goremyka, T. V. ^{[1
]}

Skripov, N. I. ^{[1
]}

Umanets, V. A. ^{[1
]}

Shmidt, F. K. ^{[1
]}

机构：

[1] Irkutsk State Univ, Irkutsk 664033, Russia

来源：

KINETICS AND CATALYSIS | 2006年 / 47卷 / 03期

关键词：

D O I：

10.1134/S0023158406030074

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 [物理化学]; 081704 [应用化学];

摘要：

The catalytic properties and nature of Ziegler-type Pd(Acac)(2) and Pd(Acac)(2)PPh3 based catalysts are studied in the hydrogenation of unsaturated compounds. The causes of an extremum appearing in the dependence of the specific activity of the catalyst in styrene and phenylacetylene hydrogenation on the proportions of the starting components are considered. The increase in the specific activity of the Pd(Acac)(2) + AlEt3 catalytic system in hydrogenation as a function of the Al/Pd ratio arises from an increase in the degree of dispersion of the microheterogeneous system, an increase in the fraction of reduced palladium, and changes in the nature of the ligand shell. The inhibiting effect is caused by triethylaluminum adsorption on palladium nanoparticles. Palladium nanoparticle models are suggested.

引用

页码：367 / 374

页数：8

共 22 条

[1]

Polynuclear homo- or heterometallic palladium(II)-platinum(II) pentafluorophenyl complexes containing bridging diphenylphosphido ligands.: 8.: Syntheses and reactivity of the tetranuclear [Pt4(μ2-PPh2)3{μ3-PPh(1,2-η2-Ph)-κ3P)(C6F5)4] cluster [J].