The Energy Dependence of the Ratio of Step and Terrace Reactivity for H2 Dissociation on Stepped Platinum

Autor:	Aart W. Kleyn, Irene M. N. Groot, Ludo B. F. Juurlink
Přispěvatelé:	S&C overig (HIMS, FNWI), Faculty of Science and Technology, XUV Optics
Jazyk:	angličtina
Rok vydání:	2011
Předmět:	Stereochemistry chemistry.chemical_element Nanoparticle General Chemistry General Medicine Heterogeneous catalysis Catalysis Dissociation (chemistry) METIS-304853 chemistry Chemical physics IR-104548 Molecule Platinum
Zdroj:	Angewandte Chemie, 123(22), 5280-5283. John Wiley and Sons Ltd Angewandte Chemie (international edition), 50(22), 5174-5177. Wiley Angewandte Chemie International Edition, 50(22), 5174-5177 Angewandte Chemie-International Edition, 50, 5174-5177 Angewandte Chemie, International Edition, 50(22), 5174-5177. John Wiley and Sons Ltd
ISSN:	0044-8249 1433-7851
DOI:	10.1002/ange.201007093
Popis:	The fraction of dissociation processes f D for H2 on platinum that take place on low‐coordinate sites of nanoparticles is strongly dependent on the gas temperature of the incoming molecules and on the diameter d of the nanoparticles (see picture). For high gas temperatures and large nanoparticles, dissociation occurs mostly on terraces. Therefore, assumptions that steps always dominate reaction in heterogeneous catalysis cannot be justified.
Databáze:	OpenAIRE
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