Abstract: Thermodesorption spectroscopy (TDS) and temperature-programmed reaction (TPR) using a beam-forming gas doser and oxygen isotopes 18O2 and 16O2 have been applied for studying the titration of adsorbed Оads and subsurface oxygen Оsubs on a reconstructed Pd(1 1 0) surface. Subsurface oxygen appears to be non-reactive. However, as the reaction proceeds, it comes onto the surface and interacts with adsorbed CO. Numerical simulations have been applied to investigate the Оsubs → Оads transfer kinetics. On the reconstructed surface the stage Оsubs → Оads is reversible, and its rate is linearly dependent on the concentration of surface sites freed during the reaction Оads + СОads → СО2. The temperature dependencies of direct and reversed reaction rate constants have been determined. As the adsorbed oxygen concentration decreases to some threshold value, a self-accelerated irreversible subsurface oxygen outcome occurs caused by a surface reconstruction to the structure (1 × 1). The kinetic equation for the process has been suggested. The temperature dependence of the critical surface oxygen coverage initiating the surface reverse reconstruction has been determined.

Cite: Matveev A.V. , Sadovskaya E.M. , Bryliakova (Sametova) A.A. , Gorodetskii V.V.
Isotopic Transient Kinetic Study of CO Oxidation on Pd(1 1 0)
Journal of Molecular Catalysis A: Chemical. 2016. V.420. P.18-25. DOI: 10.1016/j.molcata.2016.04.001 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Mar 27, 2016
Accepted:	Apr 1, 2016
Published online:	Apr 2, 2016
Published print:	Aug 1, 2016

Identifiers:

Web of science:	WOS:000378366300003
Scopus:	2-s2.0-84962798115
Elibrary:	26996327
Chemical Abstracts:	2016:623245
Chemical Abstracts (print):	164:537658
OpenAlex:	W2335634302

Citing:

DB	Citing
Web of science	5
Scopus	5
Elibrary	6
OpenAlex	6

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