Controlled Formation of Nickel Oxide Nanoparticles on Mesoporous Silica using Molecular Ni4O4 Clusters as Precursors: Enhanced Catalytic Performance for Dry Reforming of Methane

Supported NiO nanoparticles (NPs) were prepared by impregnation of mesoporous silica SBA‐15 with a molecular, metalorganic [Ni4O4] cubane cluster as precursor. By using this ligand‐stabilized Ni cluster, deposition of four Ni ions in close proximity on the silica support was achieved; this resulted...

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Bibliographic Details
Published in:ChemCatChem 2015-04, Vol.7 (8), p.1280-1284
Main Authors: Baktash, Elham, Littlewood, Patrick, Pfrommer, Johannes, Schomäcker, Reinhard, Driess, Matthias, Thomas, Arne
Format: Article
Language:English
Subjects:
dry reforming of methane
heterogeneous catalysis
molecular precursor
nanoparticles
Silica
supported catalysts
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Summary:Supported NiO nanoparticles (NPs) were prepared by impregnation of mesoporous silica SBA‐15 with a molecular, metalorganic [Ni4O4] cubane cluster as precursor. By using this ligand‐stabilized Ni cluster, deposition of four Ni ions in close proximity on the silica support was achieved; this resulted in the formation of small and highly dispersed NiO NPs after heat treatment. These clusters were shown to have a significant influence on the formation of NiO NPs compared to a conventional Ni(OAc)2 precursor. After a further reduction step, the materials were used as catalysts for the dry reforming of methane, which showed that preorganization of the Ni atoms on the support surface had a beneficial effect on the methane conversion rate. The knights of Ni: Impregnation of mesoporous silica with an organometallic Ni4 cubane precursor and subsequent thermal treatment yield highly active and stable catalysts for the dry reforming of methane.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201402983