NDLI: A new approach to well-defined, stable and site-isolated catalysts

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Content Provider	Taylor & Francis Online
Author	Teschner, D. Armbrüster, M. Knop-Gericke, A. Schlögl, R. Kovnir, K. Venkov, T. V. Grin, Yu Jentoft, F. C.
Abstract	A new concept to circumvent some of the problems that are hindering a rational metallic catalyst development is introduced. Investigation of conventional metal catalysts — which consist of supported metals, metal mixtures or alloys — is handicapped by the presence of a variety of active sites, their possible agglomeration, metal–support interactions as well as segregation of the components. In order to avoid most of the drawbacks, we employ well-defined, ordered and in-situ stable unsupported intermetallic compounds. Knowledge of the chemical bonding in the compounds and the defined neighbourhood of the active sites allows a rational approach to catalysts with excellent selectivity as well as long-term stability. The concept is demonstrated for the intermetallic compound PdGa, which is applied as catalyst for the selective hydrogenation of acetylene to ethylene.
Starting Page	420
Ending Page	427
Page Count	8
File Format	PDF HTM / HTML
ISSN	14686996 18785514
DOI	10.1016/j.stam.2007.05.004
Journal	Science and Technology of Advanced Materials
Volume Number	8
Issue Number	5
Language	English
Publisher	Taylor & Francis
Publisher Date	2007-08-08
Access Restriction	Open
Subject Keyword	PdGa Intermetallic compound Heterogeneous catalysis Selective hydrogenation Acetylene Site isolation Electron localizability indicator Chemical bonding In-situ XPS FTIR
Content Type	Text
Resource Type	Article
Subject	Materials Science

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In situ studies of site-isolated hydrogenation catalysts – the intermetallic compound pdga.

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