Modifying Surfaces of Мо(110) with Boron Atoms As a Way of Controlling the Adsorption–Reaction Properties of СО and О2 Molecules.

Autor: Magkoev, T. T., Tvauri, I. V., Zaalishvili, V. B., Silaev, I. V., Bliev, A. P., Turiev, A. M., Sozaev, Z. T.
Zdroj: Russian Journal of Physical Chemistry; Jul2022, Vol. 96 Issue 7, p1541-1545, 5p
Abstrakt: Surface-sensitive means of analysis in an ultrahigh vacuum are used to show the adsorption-reactive properties of carbon oxide (СО) and oxygen (О2) molecules on a Мо(110) surface change radically when it is alloyed with boron (В/Мо(110)). Unlike the dissociative adsorption of СО and О2 by a Мо(110) surface, the adsorption of CO and О2 by the В/Мо(110) alloy's surface is molecular with the possibility of intense oxidation of carbon oxide upon the joint adsorption (СО + О2). The efficiency of this process is considerably higher at CO coverages lower than that of saturation, which testifies to the key role of the free adsorption-reactive centers of the boron-modified Мо(110) surface. It is shown that the formation of such centers could be responsible for the transformation of the electronic state of СО and О2 molecules in alloying Мо(110) with boron, and thus for the observed molecular transformation СО + О2 → СО2 as well. The В/Мо(110) system may therefore be considered an alternative to catalysts with the corresponding action, which are normally composed of precious metals. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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