Effect of ion exchange by an organic cation on platinum immobilization on clays

被引：10

作者：

Szöllosi, G ^{[1
]}

Mastalir, A ^{[1
]}

Bartók, M ^{[1
]}

机构：

[1] Univ Szeged, Dept Organ Chem, Hungarian Acad Sci, Organ Catalysis Res Grp, H-6820 Szeged, Hungary

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 2001年 / 74卷 / 02期

关键词：

cationic clay; ion exchange; platinum; cinchonidinium cation;

D O I：

10.1023/A:1017928909406

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：

Clay-supported platinum catalysts were prepared by ion exchange. The platinum precursor has been reduced either in the presence or in the absence of cinchonidinium cations introduced in the interlamellar space of the cationic clay. The samples were characterized by XRD and TEM. Reduction by NaBH4 in the absence of cinchonidinium cations and the subsequent introduction of this latter ensured the formation of monodispersed, small platinum crystallites immobilized mostly between the clay sheets. On the other hand, reduction in the presence of the organic cations resulted in migration of the platinum particles on the external surface of the clay.

引用

页码：241 / 249

页数：9

共 15 条

[1]

[Anonymous], 2001, FINE CHEM HETEROGENE

[2]

[Anonymous], 1993, ORGANIC CHEM USING C

[3] Homogeneous and heterogeneous asymmetric reactions.: Part X:: Enantioselective hydrogenations over K-10 montmorillonite supported noble metal catalysts with immobilized modifier [J].