INDUCED HETEROGENEITY AT THE SURFACE OF GROUP-4 DIOXIDES AS REVEALED BY CO ADSORPTION AT ROOM-TEMPERATURE

被引：48

作者：

BOLIS, V ^{[1
]}

FUBINI, B ^{[1
]}

GARRONE, E ^{[1
]}

MORTERRA, C ^{[1
]}

UGLIENGO, P ^{[1
]}

机构：

[1] UNIV TURIN,DIPARTIMENTO CHIM INORGAN CHIM FIS & CHIM MAT,VIA PIETRO GIURIA 9,I-10125 TURIN,ITALY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1992年 / 88卷 / 03期

关键词：

D O I：

10.1039/ft9928800391

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, volumetric and calorimetric data for TiO2, ZrO2 and HfO2, variously pretreated, are reported and discussed. Two types, at least, of M4+ sites are potentially present on all oxides, differing by the degree of coordinative unsateration. Surface impurities may alter or suppress them. Besides this structural heterogeneity, transmission of electronic effects through the solid induces heterogeneity during adsorption (shift of CO stretching frequency with coverage). The two phenomena are strictly related: the same relationship is proposed for the changes in absorption coefficient with peak position. This allows a new way of decomposing overall isotherms into individual contributions.

引用

页码：391 / 398

页数：8

共 25 条

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