ROLE OF SILANOL GROUPS IN DISPERSING MO(VI) ON SILICA

被引：45

作者：

ROARK, RD ^{[1
]}

KOHLER, SD ^{[1
]}

EKERDT, JG ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT CHEM ENGN,AUSTIN,TX 78712

来源：

CATALYSIS LETTERS | 1992年 / 16卷 / 1-2期

关键词：

SPREADING; DEHYDRATION; MOLYBDENUM OXIDE; SILICA; INFRARED SPECTROSCOPY;

D O I：

10.1007/BF00764356

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：

Infrared spectroscopy was used to follow the intensity of the isolated silanol stretching mode during the reversible transformation of supported molybdenum between the hydrated, polymolybdate structure and the dehydrated, isolated Mo6+ structure. The isolated silanol absorbance intensity was attenuated upon dehydration and spreading of Mo6+. The Si-OH (or Si-OD) silanol band was regenerated by rehydration with H2O (or D2O). A model for spreading is proposed in which the surface silanol groups are the sites for attachment of the isolated Mo6+ cation.

引用

页码：71 / 76

页数：6

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