CATEGORY: CATALYSIS: METAL ORGANIC FRAMEWORKS
Origin of highly active metal–organic framework catalysts: defects? Defects!
Origin of highly active metal–organic framework catalysts: defects? Defects!
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Type
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Journal Article
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Author
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J. Canivet
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Author
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M. Vandichel
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URL
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Volume
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45
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Issue
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10
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Pages
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4090-4099
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Publication
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Dalton Transactions
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Date
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2016/03/01
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Abstract
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Reviews the nature of catalytic sites in MOFs.
Over the past decade, several interesting studies have reported outstanding
catalytic activities of MOFs. In each case, the authors were intrigued, since
it was unexpected from the ideal structure. Authors show that (surface) defects
are at the origin of the catalytic activities for the reported examples.
The vacancy of ligands or linkers systematically generates (surface) terminations which can possibly show Lewis and/or Brønsted acido-basic features. The engineering of catalytic sites at the nodes by the intentional creation of defects appears today as a rational approach for the design of active MOFs. Like zeolite post-treatments, post-modifications of MOFs by linker or metal cation exchange appear to be methods of choice. Despite the mild acidity of defective MOFs, researchers can account for very active MOFs in a number of catalytic applications which show higher performances than zeolites or benchmark catalysts. |
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