The adsorption of methanol, water and ethylene on a niobium oxide thin film

被引：2

作者：

Zhong, CM ^{[1
]}

Wang, DZ ^{[1
]}

Ushikubo, T ^{[1
]}

Wada, K ^{[1
]}

机构：

[1] Mitsubishi Chem Corp, Yokohama Res Ctr, Aoba Ku, Yokohama, Kanagawa 227, Japan

来源：

ACTA PHYSICO-CHIMICA SINICA | 1998年 / 14卷 / 03期

关键词：

niobium oxide; thin film; adsorption; methanol; water; ethylene;

D O I：

10.3866/PKU.WHXB19980306

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：

A niobium oxide thin film was obtained by oxidizing Nb(110). UPS was used to characterize the adsorption of methanol,water and ethylene on this film at different temperatures. The results show that at 140 K, methanol and water chemisorb associatively at all coverages, while ethylene chemisorbs in low coverages and physisorbs at. high coverages. At. 300 K, these molecules adsorb dissociativelly. The adsorption on surface defect centers is stronger: molecules are adsorbed on these sites first, and are also more affected by the adsorption. Nb5+ is the main adsorption centers on the surface, but oxygen ions on the surface are also adsorption centers.

引用

页码：219 / 225

页数：7

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