Water Vapour Adsorption on the Iron(111) Surface Studied by LEED and WFC

✍ Scribed by Dr. sc. nat. H.-J. Müssig; W. Arabczyk

• Publisher: John Wiley and Sons
• Year: 1981
• Tongue: English
• Weight: 465 KB
• Volume: 16
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.2170160715

✦ Synopsis

Abstract

In a sample isolation and gas inlet system for aggressive gases saturation states of adsorption as a function of water vapour pressure were generated on the Fe(111)‐surface at room temperature and analyzed quantitatively under ultra‐high vacuum conditions using the methods LEED and WFC. There is a random adsorption layer emerging passing over into a p(1 × 1) structure when heated between 200°C and 400°C. This structure is more resistent to heat and oxygen treatment than an oxygen adsorption or oxide layer, respectively. The adsorption velocity for oxygen on the p(1 × 1)–H~2~O structure amounts to only about 15% of the adsorption velocity on the p(1 × 1)–O structure. The adsorption isotherm measured can be described through a theoretical model.