A well-defined supported metal catalyst : Ir4/MgO

S.D. Maloney; F.B.M. Zon, van; D.C. Koningsberger; B.C. Gates; M.J. Kelley

doi:10.1007/BF00763948

A well-defined supported metal catalyst : Ir4/MgO

S.D. Maloney, F.B.M. Zon, van, D.C. Koningsberger, B.C. Gates, M.J. Kelley

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Abstract

[Ir4(CO)12] was used as a precursor for the prepn. of a MgO-supported catalyst with a uniquely simple metal structure, Ir4. The precursor was adsorbed on MgO from hexanes with the metal framework remaining intact, as detd. by EXAFS spectra. The surface-bound species was predominantly [HIr4(CO)11]-, which could be extd. from the surface by cation metathesis and identified in soln. by IR spectroscopy. After treatment of the MgO-supported Ir carbonyl in He followed by H2 at 300°, the sample was characterized again by EXAFS spectroscopy. The predominant surface species are clusters of 4 Ir atoms with an av. Ir-Ir distance of 2.69 .ANG..

Original language	English
Pages (from-to)	161-168
Journal	Catalysis Letters
Volume	5
Issue number	2
DOIs	https://doi.org/10.1007/BF00763948
Publication status	Published - 1990

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title = "A well-defined supported metal catalyst : Ir4/MgO",

abstract = "[Ir4(CO)12] was used as a precursor for the prepn. of a MgO-supported catalyst with a uniquely simple metal structure, Ir4. The precursor was adsorbed on MgO from hexanes with the metal framework remaining intact, as detd. by EXAFS spectra. The surface-bound species was predominantly [HIr4(CO)11]-, which could be extd. from the surface by cation metathesis and identified in soln. by IR spectroscopy. After treatment of the MgO-supported Ir carbonyl in He followed by H2 at 300°, the sample was characterized again by EXAFS spectroscopy. The predominant surface species are clusters of 4 Ir atoms with an av. Ir-Ir distance of 2.69 .ANG..",

author = "S.D. Maloney and {Zon, van}, F.B.M. and D.C. Koningsberger and B.C. Gates and M.J. Kelley",

year = "1990",

doi = "10.1007/BF00763948",

language = "English",

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journal = "Catalysis Letters",

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T1 - A well-defined supported metal catalyst : Ir4/MgO

AU - Maloney, S.D.

AU - Zon, van, F.B.M.

AU - Koningsberger, D.C.

AU - Gates, B.C.

AU - Kelley, M.J.

PY - 1990

Y1 - 1990

N2 - [Ir4(CO)12] was used as a precursor for the prepn. of a MgO-supported catalyst with a uniquely simple metal structure, Ir4. The precursor was adsorbed on MgO from hexanes with the metal framework remaining intact, as detd. by EXAFS spectra. The surface-bound species was predominantly [HIr4(CO)11]-, which could be extd. from the surface by cation metathesis and identified in soln. by IR spectroscopy. After treatment of the MgO-supported Ir carbonyl in He followed by H2 at 300°, the sample was characterized again by EXAFS spectroscopy. The predominant surface species are clusters of 4 Ir atoms with an av. Ir-Ir distance of 2.69 .ANG..

AB - [Ir4(CO)12] was used as a precursor for the prepn. of a MgO-supported catalyst with a uniquely simple metal structure, Ir4. The precursor was adsorbed on MgO from hexanes with the metal framework remaining intact, as detd. by EXAFS spectra. The surface-bound species was predominantly [HIr4(CO)11]-, which could be extd. from the surface by cation metathesis and identified in soln. by IR spectroscopy. After treatment of the MgO-supported Ir carbonyl in He followed by H2 at 300°, the sample was characterized again by EXAFS spectroscopy. The predominant surface species are clusters of 4 Ir atoms with an av. Ir-Ir distance of 2.69 .ANG..

U2 - 10.1007/BF00763948

DO - 10.1007/BF00763948

M3 - Article

SN - 1011-372X

VL - 5

SP - 161

EP - 168

JO - Catalysis Letters

JF - Catalysis Letters

IS - 2

ER -

A well-defined supported metal catalyst : Ir4/MgO

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