LOW-TEMPERATURE REDUCTION OF GALLIUM IN A GA2O3 HZSM-5 CATALYST

被引：45

作者：

CARLI, R ^{[1
]}

BIANCHI, CL ^{[1
]}

GIANNANTONIO, R ^{[1
]}

RAGAINI, V ^{[1
]}

机构：

[1] UNIV MILAN,DEPT PHYS CHEM & ELECTROCHEM,VIA GOLGI 19,I-20133 MILAN,ITALY

来源：

JOURNAL OF MOLECULAR CATALYSIS | 1993年 / 83卷 / 03期

关键词：

IN-SITU REDUCTION; XPS MEASUREMENTS; GALLIUM OXIDATION STATE; ACTIVATED HYDROGEN;

D O I：

10.1016/0304-5102(93)87046-B

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：

Several experiments were performed to provide convincing evidence for low temperature gallium reduction in a Ga2O3/HZSM-5 catalyst. XPS measurements showed the appearance of a Ga(I) signal after in situ hydrogen reduction at temperatures ranging between 373 and 673 K. No transfer of reduced gallium species from Ga2O3 to the zeolite particles was detected. A revision of the existing reduction mechanism is thus proposed. It is suggested here that the actual role of the HZSM-5 zeolite could be to provide a kind of activated hydrogen able to reduce Ga2O3.

引用

页码：379 / 389

页数：11

共 38 条

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