Site blocking effects in ethylidyne decomposition kinetics on ruthenium(001): in-situ study with infrared reflection absorption spectroscopy at elevated pressure

Autor:	Friedrich M. Hoffmann, Charles A. Mims, Mark D. Weisel, John H. Sinfelt, J. M. White
Rok vydání:	1993
Předmět:	Absorption spectroscopy Hydrogen Inorganic chemistry Kinetics General Engineering Infrared spectroscopy chemistry.chemical_element Photochemistry Decomposition Chemical kinetics chemistry.chemical_compound chemistry Physical and Theoretical Chemistry Chemical decomposition Carbon monoxide
Zdroj:	The Journal of Physical Chemistry. 97:12656-12659
ISSN:	1541-5740 0022-3654
DOI:	10.1021/j100151a002
Popis:	Utilizing in-situ FT-IRAS, we have investigated the decomposition kinetics of ethylidyne in the presence of coadsorbates on Ru(001). The results demonstrate that the stabilizing effect of coadsorbed CO and hydrogen is significantly enhanced at elevated pressure, supporting a model wherein an empty neighboring metal site is required before decomposition can proceed. We identify a weakly adsorbed CO species in 3-fold hollow sites in close proximity to the ethylidyne, whose coverage is controlled by the CO pressure at elevated temperatures. The results demonstrate the importance of weakly adsorbed species at high coverage in controlling surface reactions at elevated pressures and temperatures. 26 refs., 3 figs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::39a5171a5cd01d8927779759f5c7d17a https://doi.org/10.1021/j100151a002 Zobrazit plný text záznamu