Influence of aluminum particle sizes on their surface chemical characteristics, investigated by probe gas temperature programmed desorption mass spectrometry
A technique is described for the production, sampling, and investigation of the surface chemical reaction characteristics of nanosized particles of metals. Reactions of aluminum (Al) particles with average sizes 5, 37 and 100 nm with water (ordinary and deuterated), acetic acid, carbon dioxide and ethylene, were investigated. Adsorption with decomposition of adsorbate molecules, and with formation of short quasi-polymer chains in the case of organic molecules, was observed. A dependence of energy distribution characteristics of surface active sites on particle size was revealed. A trend was observed that active surface sites of very small particles (less than 10 nm) form stronger bonds with adsorbed molecules. Copyright 1999 John Wiley & Sons, Ltd.
Jigatch
AN
Institute for Energy Problems of Chemical Physics RAS, bd. 2 Leninsky pr-t 38, Moscow B-334, 117829 Russia.
Leipunsky
IO
Kuskov
ML
Verzhbitskaya
TM