ENHANCED REDUCIBILITY OF NI AND NI + PD IN ZEOLITE-Y - BLOCKING OF SMALL CAGES WITH CA-2+ OR MG-2+ IONS

被引：12

作者：

FEELEY, JS ^{[1
]}

SACHTLER, WMH ^{[1
]}

机构：

[1] NW UNIV,IPATIEFF LAB,EVANSTON,IL 60208

来源：

CATALYSIS LETTERS | 1991年 / 9卷 / 5-6期

关键词：

NI/Y ZEOLITE; NIPD/Y ZEOLITE; ENHANCED REDUCIBILITY; MGY; CAY;

D O I：

10.1007/BF00764829

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：

Reducibility of zeolite encaged Ni2+ was found by temperature programmed reduction to increase in the following order Ni/NaY < Ni/MgY < Ni/CaY < (Pd + Ni)/NaY < (Pd + Ni)/MgY < (Pd + Ni)/CaY. In comparison with NaY supported samples, bimetallic MgY and CaY supported samples exhibited enhanced Pd2+ and Ni2+ reducibility as well as higher H(ads)/Me-degrees ratios after reduction below 500-degrees-C. Temperature programmed reduction (TPR) and desorption (TPD) results indicate that Mg2+ and Ca2+ ions are occupying the small cages in the zeolite thus preventing the migration of the majority of Ni2+ and Pd2+ ions to these cages.

引用

页码：377 / 386

页数：10

共 24 条

[1] X-RAY STUDY OF THE ACTIVATION, REDUCTION, AND REOXIDATION OF PALLADIUM IN Y-TYPE ZEOLITES [J].