THE INFLUENCE OF COADSORBATES (K, O) ON THE AUTOCATALYTIC DECOMPOSITION OF ACETIC ACID ON Rh{111}

Autor:	D.A. King, D. C. Papageorgopoulos, G. Hoogers
Rok vydání:	1994
Předmět:	Chemistry Potassium Inorganic chemistry chemistry.chemical_element Surfaces and Interfaces Condensed Matter Physics Oxygen Decomposition Surfaces Coatings and Films Autocatalysis Acetic acid chemistry.chemical_compound Desorption Materials Chemistry
Zdroj:	Surface Review and Letters. :553-555
ISSN:	1793-6667 0218-625X
DOI:	10.1142/s0218625x94000643
Popis:	The autocatalytic decomposition of acetic acid has been studied with TPD on the Rh{111} surface with and without the presence of coadsorbates. Sharp H2 and CO 2 desorption peaks indicating autocatalytic processes are produced after saturating the surface with acetate, and also after coadsorption of oxygen and potassium at room temperature. Oxygen is found to stabilize the acetate; potassiun destabilizes the acetate, and O/K mixtures have an intermediate effect. The results are discussed in terms of a simple empty-site-creation autocatalytic mechanism for systems in which the surface is initially fully saturated with adsorbate species.
Databáze:	OpenAIRE
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