COADSORPTION OF CO AND O2 ON FE .2. CALORIMETRIC DETERMINATION OF HEATS OF ADSORPTION ON POLYCRYSTALLINE FE FILMS AND THERMAL-DESORPTION SPECTROSCOPY

被引：13

作者：

GANZMANN, I

BORGMANN, D

WEDLER, G

机构：

[1] Institut füt Physikalische und Theoretische Chemic, Universität Erlangen-Nürnberg, Erlangen, D-8520

来源：

MOLECULAR PHYSICS | 1992年 / 76卷 / 04期

关键词：

D O I：

10.1080/00268979200101711

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 combination of calorimetric measurement of heat of adsorption and of thermal desorption spectroscopy (TDS) is used to study the adsorption of CO and O2 as well as co-adsorption of both gases on Fe films. There is a strong influence of the sequence of admission of the gases on their adsorption behaviour. Oxygen is able to block adsorption sites of CO as well as to replace CO from the surface. Generally, TDS is not able to give information on the situation at the adsorption temperature, neither in the case of CO adsorption, nor in the case of co-adsorption of CO and O2. The use of labelled oxygen (O-18(2)) improves the value of TDS experiments in such systems.

引用

页码：823 / 831

页数：9

共 18 条

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[2]

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[3]

Bauer Th., UNPUB

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