Rut'kov E. V.1, Afanas’eva E. Y.1, Gall N. R.1
1Ioffe Institute, St. Petersburg, Russia
Email: rutkov@ms.ioffe.ru, afanaseva@ms.ioffe.ru, gall@ms.ioffe.ru
The adsorption of PCl3 molecules on (10=10)Re was studied in a wide temperature range of 300-2000 K. It was shown that at room temperature PCl3 molecules are chemisorbed on the surface, apparently in a partially dissociated form. At T~ 800 K, thermal desorption of chlorine begins, and at T>1100 K, only phosphorus remains on the surface. When PCl3 is adsorbed in the range T=1100-1200 K, a surface compound with ReP stoichiometry is formed. The surface compound begins to decompose at 1200 K as a result of thermal desorption; P atoms finally leave the rhenium surface at T~ 1850 K, which corresponds to a change in the desorption activation energy from 3.3 eV to 5.1 eV. Keywords: phosphorus, rhenium, adsorption, surface compound, thermal desorption.
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