STUDY OF AUTOREDUCTION AND DISPERSION OF PT IN BETA-ZEOLITE

被引：0

作者：

ZHENG, J

DONG, JL

XU, QH

机构：

来源：

ZEOLITES AND RELATED MICROPOROUS MATERIALS: STATE OF THE ART 1994 | 1994年 / 84卷

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D O I：

暂无

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：

TPR,TPO and FTIR were used to study the elementary processes occurred in the calcination of Pt(NH3)(2)Cl-2 supported on K beta zeolite. Using CO-FTIR, we found directly that while the Pt ammine complexes decomposed at about 300 degrees C, autoreduction of Pt2+ ions by NH3 groups occurred and led to the formation of Pt-o atoms prematurely. Reoxidation of the reduced sample could decrease the extent of Pt agglomeration caused by autoreduction. The unique effect of Ba2+ ions on Pt dispersion was also studied. Aromatization of n-hexane and methylcyclopentane were used to study the effect of Pt dispersion on catalytic properties.

引用

页码：1641 / 1647

页数：7

共 17 条

[1]

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[2]

BERNARD JR, 1980, 5TH P INT C ZEOL NAP, P686

[3] INTERACTION OF CO WITH PLATINUM SPECIES IN ZEOLITES - EVIDENCE FOR PLATINUM CARBONYLS IN PARTIALLY REDUCED ZEOLITE PTNAX [J].