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A New Approach to Well-Defined, Stable and Site-Isolated Catalysts

MPS-Authors
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Armbrüster,  Marc
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Max-Planck-Institut für Chemische Physik fester Stoffe;

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Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Venkov,  Tzvetomir V.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Jentoft,  Friederike C.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

STAM_Edoc319053.pdf
(Any fulltext), 338KB

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Citation

Kovnir, K., Armbrüster, M., Teschner, D., Venkov, T. V., Jentoft, F. C., Knop-Gericke, A., et al. (2007). A New Approach to Well-Defined, Stable and Site-Isolated Catalysts. Science and Technology of Advanced Materials, 8(5), 420-427. doi:10.1016/j.stam.2007.05.004.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-0010-1
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 allow 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.