Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe3(CO)11]- and Fe3(CO)12 supported on magnesia

F. Hugues; J. A. Dalmon; P. Bussiere; A. K. Smith; J. M. Basset; D. Olivier

doi:10.1021/j100223a017

Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe₃(CO)₁₁]^- and Fe₃(CO)₁₂ supported on magnesia

F. Hugues, J. A. Dalmon, P. Bussiere, A. K. Smith, J. M. Basset^*, D. Olivier

^*Corresponding author for this work

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Abstract

Thermal decomposition of the supported clusters [HFe₃(CO)₁₁]^-/MgO and Fe₃(CO)₁₂/MgO results in heterogeneous catalysts which are selective for low molecular weight olefins in the Fischer-Tropsch synthesis. Characterization of the metal particles resulting from such decomposition has been carried out by using IR, ferromagnetic resonance (FMR), Mössbauer, magnetism, and gas-phase analysis. The results depend on the state of dehydration of the support: on highly hydrated magnesia (MgO 25), [HFe₃(CO)₁₁]^-Mg⁺ undergoes an electrophilic attack by surface protons with formation of a significant amount of Fe²⁺ and H₂ which makes difficult the characterization of zerovalent iron. On highly dehydrated magnesia (MgO 400), thermal decomposition of the supported Fe₃(CO)₁₂ is irreversible and the zerovalent iron is not oxidized by surface protons. During the decarbonylation process the iron agglomerates into a superparamagnetic particle of zerovalent iron covered with dissociated CO.

Original language	English (US)
Pages (from-to)	5136-5144
Number of pages	9
Journal	Journal of Physical Chemistry
Volume	86
Issue number	26
DOIs	https://doi.org/10.1021/j100223a017
State	Published - 1982
Externally published	Yes

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General Engineering
Physical and Theoretical Chemistry

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Hugues, F., Dalmon, J. A., Bussiere, P., Smith, A. K., Basset, J. M., & Olivier, D. (1982). Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe₃(CO)₁₁]^- and Fe₃(CO)₁₂ supported on magnesia. Journal of Physical Chemistry, 86(26), 5136-5144. https://doi.org/10.1021/j100223a017

@article{b4060cd5eda445d8a782083e5edf33fa,

title = "Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe3(CO)11]- and Fe3(CO)12 supported on magnesia",

abstract = "Thermal decomposition of the supported clusters [HFe3(CO)11]-/MgO and Fe3(CO)12/MgO results in heterogeneous catalysts which are selective for low molecular weight olefins in the Fischer-Tropsch synthesis. Characterization of the metal particles resulting from such decomposition has been carried out by using IR, ferromagnetic resonance (FMR), M{\"o}ssbauer, magnetism, and gas-phase analysis. The results depend on the state of dehydration of the support: on highly hydrated magnesia (MgO 25), [HFe3(CO)11]-Mg+ undergoes an electrophilic attack by surface protons with formation of a significant amount of Fe2+ and H2 which makes difficult the characterization of zerovalent iron. On highly dehydrated magnesia (MgO 400), thermal decomposition of the supported Fe3(CO)12 is irreversible and the zerovalent iron is not oxidized by surface protons. During the decarbonylation process the iron agglomerates into a superparamagnetic particle of zerovalent iron covered with dissociated CO.",

author = "F. Hugues and Dalmon, {J. A.} and P. Bussiere and Smith, {A. K.} and Basset, {J. M.} and D. Olivier",

year = "1982",

doi = "10.1021/j100223a017",

language = "English (US)",

volume = "86",

pages = "5136--5144",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "26",

}

Hugues, F, Dalmon, JA, Bussiere, P, Smith, AK, Basset, JM & Olivier, D 1982, 'Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe₃(CO)₁₁]^- and Fe₃(CO)₁₂ supported on magnesia', Journal of Physical Chemistry, vol. 86, no. 26, pp. 5136-5144. https://doi.org/10.1021/j100223a017

Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe₃(CO)₁₁]^- and Fe₃(CO)₁₂ supported on magnesia. / Hugues, F.; Dalmon, J. A.; Bussiere, P. et al.
In: Journal of Physical Chemistry, Vol. 86, No. 26, 1982, p. 5136-5144.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe3(CO)11]- and Fe3(CO)12 supported on magnesia

AU - Hugues, F.

AU - Dalmon, J. A.

AU - Bussiere, P.

AU - Smith, A. K.

AU - Basset, J. M.

AU - Olivier, D.

PY - 1982

Y1 - 1982

N2 - Thermal decomposition of the supported clusters [HFe3(CO)11]-/MgO and Fe3(CO)12/MgO results in heterogeneous catalysts which are selective for low molecular weight olefins in the Fischer-Tropsch synthesis. Characterization of the metal particles resulting from such decomposition has been carried out by using IR, ferromagnetic resonance (FMR), Mössbauer, magnetism, and gas-phase analysis. The results depend on the state of dehydration of the support: on highly hydrated magnesia (MgO 25), [HFe3(CO)11]-Mg+ undergoes an electrophilic attack by surface protons with formation of a significant amount of Fe2+ and H2 which makes difficult the characterization of zerovalent iron. On highly dehydrated magnesia (MgO 400), thermal decomposition of the supported Fe3(CO)12 is irreversible and the zerovalent iron is not oxidized by surface protons. During the decarbonylation process the iron agglomerates into a superparamagnetic particle of zerovalent iron covered with dissociated CO.

AB - Thermal decomposition of the supported clusters [HFe3(CO)11]-/MgO and Fe3(CO)12/MgO results in heterogeneous catalysts which are selective for low molecular weight olefins in the Fischer-Tropsch synthesis. Characterization of the metal particles resulting from such decomposition has been carried out by using IR, ferromagnetic resonance (FMR), Mössbauer, magnetism, and gas-phase analysis. The results depend on the state of dehydration of the support: on highly hydrated magnesia (MgO 25), [HFe3(CO)11]-Mg+ undergoes an electrophilic attack by surface protons with formation of a significant amount of Fe2+ and H2 which makes difficult the characterization of zerovalent iron. On highly dehydrated magnesia (MgO 400), thermal decomposition of the supported Fe3(CO)12 is irreversible and the zerovalent iron is not oxidized by surface protons. During the decarbonylation process the iron agglomerates into a superparamagnetic particle of zerovalent iron covered with dissociated CO.

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IS - 26

ER -

Catalysis by supported clusters. Characterization of highly dispersed zerovalent iron covered with dissociated CO obtained by thermal decomposition of [HFe₃(CO)₁₁]^- and Fe₃(CO)₁₂ supported on magnesia

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