The reaction of water vapour with evaporated tungsten films
- 9 January 1968
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- Vol. 302 (1470) , 399-407
- https://doi.org/10.1098/rspa.1968.0025
Abstract
The interaction between water and evaporated tungsten films has been studied in the temperature range from 0 to 300°C. The adsorption processes which occur at 0°C are 2W + H2O → WOH + WH, and WH + H2O → WOH + H2, with the consequence that the tungsten surface exposed to excess water becomes covered with adsorbed hydroxyl groups. Further adsorption of water with evolution of hydrogen occurs at higher temperatures and at 200°C the surface attains a composition intermediate between WO2H and WO2. The same surface composition is achieved when water is allowed to react with an oxygen-covered surface at 200°C. At 300°C the interaction of water with tungsten leads to oxidation of the metal with the formation of hydrogen.Keywords
This publication has 1 reference indexed in Scilit:
- The Determination of Small Surface Areas by Krypton Adsorption at Low TemperaturesJournal of the American Chemical Society, 1945