Supported iridium catalysts prepared by atomic layer deposition: effect of reduction and calcination on activity in toluene hydrogenation

Autor:	Marina Lindblad, O. J. T. Jylhä, A.O.I. Krause, Riitta Silvennoinen, H. Österholm
Rok vydání:	2007
Předmět:	Thermogravimetric analysis Chemistry Catalyst support Thermal decomposition Inorganic chemistry chemistry.chemical_element General Chemistry Catalysis law.invention Transition metal law Calcination Particle size Iridium
Zdroj:	Catalysis Letters. 114:135-144
ISSN:	1572-879X 1011-372X
DOI:	10.1007/s10562-007-9051-7
Popis:	Ligand removal from supported iridium catalysts prepared by atomic layer deposition from Ir(acac)3 was studied by direct reduction in hydrogen flow and by calcination in oxygen flow followed by reduction in hydrogen flow, as well as by thermogravimetric analysis. Thermal decomposition of acac ligand residuals required high temperatures, and in samples containing no iridium the removal of carbonaceous species was not complete. Metallic iridium particles less than 2 nm in size were formed during direct reduction and larger particles upon calcination followed by reduction. The activity of the catalysts in toluene hydrogenation in most cases depended on particle size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::867e76f2ab803aab6c7d3c7917811f0a https://doi.org/10.1007/s10562-007-9051-7 Zobrazit plný text záznamu Plný text ve formátu PDF