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Apparent Activation Energy Difference in NO+CO and NO+H2 Reactions on the Pt(100) ​Surface Conference Abstracts

Conference 222nd ACS National Meeting
26-30 Aug 2001 , Chicago, IL
Source Abstracts of Papers, 222nd ACS National Meeting, Chicago, IL, United States, August 26-30, 2001
Compilation, 2001.
Journal Abstracts of Papers of the American Chemical Society
ISSN: 0065-7727
Output data Year: 2001, Volume: 222, Number: 1, Article number : COLL-144, Pages count :
Authors Vovk E.I. 1 , Smirnov M.Y. 1
Affiliations
1 Boreskov Institute of Catalysis, Novosibirsk 630090, Russia

Abstract: NO+CO and NO+H2 catalytic reactions on Pt(100) proceed in non-​homogeneous surface structure conditions with nonuniform distribution of adsorbed species. Adsorption of reactants on a more stable reconstructed Pt(100)​-​hex surface lifts a back hex 1x1 reconstruction forming 1x1-​islands satd. with reactant-​related species. The islands are surrounded by the clean hex phase. Dynamical effects such as kinetic oscillations, concn. waves, and "surface explosions" obsd. for these reactions arise from this complex behavior. To gain a more penetrating insight into the mechanism of these phenomena, activation energies of the reactions in coadsorption layers were measured. Exptl. results demonstrate significant difference in activation energy of the NOads+COads and NOads+H2 reactions, 130 and 40 kJ​/mol resp. This distinction is supposed to be explained by the difference in morphol. of (NOads+COads) and (NOads+Hads) coadsorption layers formed on the surface.
Cite: Vovk E.I. , Smirnov M.Y.
Apparent Activation Energy Difference in NO+CO and NO+H2 Reactions on the Pt(100) ​Surface
In compilation Abstracts of Papers, 222nd ACS National Meeting, Chicago, IL, United States, August 26-30, 2001. 2001. – C.U334-U335. WOS AN
Dates:
Published print: Aug 1, 2001
Identifiers:
Web of science: WOS:000170690001731
Chemical Abstracts: 2001:638180
Citing: Пока нет цитирований