Surface doping of rutile by vanadium

被引：5

作者：

Haber, J ^{[1
]}

Nowak, P ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland

来源：

TOPICS IN CATALYSIS | 2002年 / 20卷 / 1-4期

关键词：

vanadium; rutile; surface doping of rutile; redox transformation of vanadium;

D O I：

10.1023/A:1016351432349

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A rutile monocrystal was surface-doped with vanadium by sintering with vanadium(V) or vanadium(IV) oxides and investigated by cyclic voltammetry. It is found that vanadium diffuses into the surface layer of rutile forming a mixed oxide. Vanadium atoms in the crystal lattice of rutile are tetravalent, but the vanadium atoms in the first monolayer may be both oxidized to the pentavalent as well as reduced to the trivalent oxidation state. These redox transformations are accompanied by the exchange of oxygen and/or protons between the surface layer of the crystal and the environment as well as the exchange of charge carriers (electrons) with the conduction band edge of rutile.

引用

页码：75 / 83

页数：9

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