Catalysis Science & Technology · 2013 · 168 citations · 48 references
Natural SciencesChemical EngineeringChemistryCatalysisFunctional MaterialsReaction EngineeringCatalyst CharacterizationCatalyst DesignCatalytic MaterialsCatalytic Reaction EngineeringMetal OxidesSupported CatalystsCatalyst Structure - Activity RelationshipsMetal CatalystsMetal Oxide Catalyst DesignMetal Oxide Catalyst SynthesisMetal Oxide CatalystsMetal-organic Framework CatalystsMetal-organic FrameworksStrong Metal-support Interaction
In this work, the inclusion of free sulfonic acid groups in highly stable MOFs is explored. The synthesized catalysts have been applied in a model esterification reaction. Two metal organic frameworks bearing sulfonic acid moieties are investigated: HSO3-MIL-101(Cr) synthesized following different approaches and a new structure based on HSO3-bdc and Zr. The acidic properties, catalytic performance, deactivation and stability of the different structures are critically evaluated. In the case of MIL-101(Cr), deactivation of the sulfonic groups via formation of butanol sulfonic esters has been observed. Due to the strong interaction between –SO3− and the Cr open metal site where usually fluorine (F−) is located in the structure, the HSO3-MIL-101(Cr) catalysts are not stable under acidic regeneration conditions. When using Zr as a metal node, a new and stable sulfonic acid containing porous structure was synthesized. This structure showed high activity and full re-usability in the esterification of n-butanol with acetic acid. In this case, deactivation of the catalyst due to sulfonic ester formation could be reversed by reactivation under acidic conditions.
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Reticular synthesis and the design of new materials
Omar M. Yaghi, M. O’Keeffe, N.W. Ockwig et al. · Nature · 2003 · 9K citations
Natural Sciences, Materials Engineering, Materials Science +9
Synthesis and Stability of Tagged UiO-66 Zr-MOFs
Mathivathani Kandiah, Merete Hellner Nilsen, Sandro Usseglio et al. · Chemistry of Materials · 2010 · 2K citations