Effect of multivalent cations on agglomeration of Ru clusters supported on Y zeolite

被引：2

作者：

Cho, SJ

Yie, JE

Ryoo, R

机构：

[1] Korea Adv Inst Sci & Technol, Sch Mol Sci, Mat Chem Lab, Taejon 305701, South Korea

[2] Ajou Univ, Dept Chem Engn & Biotechnol, Suwon 441749, South Korea

来源：

CATALYSIS LETTERS | 2001年 / 71卷 / 3-4期

关键词：

Ru catalyst; Xe-129; NMR; EXAFS; XANES; NaY zeolite; metal cluster; sintering;

D O I：

10.1023/A:1009042919188

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 effect of multivalent cations. Ca2+, Ba2+, Y3+ , Ce3+ and La3+ on the agglomeration of Ru clusters on NaY zeolite under oxygen and at high temperature has been investigated with Xe-129 NMR spectroscopy and X-ray absorption fine structure. Multivalent metal cations exchanged into the zeolite suppress neither the migration nor agglomeration of small Ru clusters inside the supercage of NaY zeolite into large metal panicles onto the external surface of NaY zeolite under 1 atm oxygen above 520 K. However, the resultant Ru particle size depends on the type of metal cations exchanged into NaY zeolite.

引用

页码：163 / 167

页数：5

共 22 条

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