Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks

Mautschke, H.-H.; Drache, Franziska; Senkovska, Irena; Kaskel, Stefan; Xamena, Françesc X. Llabrés i

doi:10.1039/c8cy00742j

Cited by 99 publications

(100 citation statements)

References 36 publications

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“…This fact evidences the presence of two different Brönsted acid sites, associated with µ 3 -OH group of metal cluster. 63,58 We also observe a band at 2138 cm -1 related to physisorbed CO. 61,62 Moreover, when these samples were pre-treated at 250 °C under high-vacuum ( Figure 8. c and d) for release of formate linkers 54 and/or dehydroxylation of the cluster, 56 two bands are identified at 2155 cm -1 , corresponding to the interaction of CO with Brönsted acid sites, and at 2177 cm -1 , being assigned to Lewis acid centres. This means that one of the types of Brönsted acid sites was lost with the dehydroxylation, generating Lewis acid sites.…”

Section: Role Of Acid Sites In Mofs Catalytic Performancementioning

confidence: 68%

“…Thermodynamically, in some case, the number of defects in the material structure is related to its stability [56, 57] . In MOFs, which are crystalline solids in all their infinite network, these defects could be introduced spontaneously or in a controlled manner, modulating their final properties [58, 52] . Active sites are coordinatively unsaturated metal centers (CUS) present in the MOF intrinsically by design and additionally as a consequence of defects derived from uncoordinated ligands to the metal center.…”

Section: Resultsmentioning

confidence: 99%

“…56,57 In MOFs, which are crystalline solids in all their infinite network, these defects could be introduced spontaneously or in a controlled manner, modulating their final properties. 58,52 Active sites are coordinatively unsaturated metal centres (CUS) present in the MOF intrinsically by design and additionally as a consequence of defects derived from uncoordinated ligands to the metal centre. This means that there is a direct relation between defects and active sites.…”

Section: Role Of Acid Sites In Mofs Catalytic Performancementioning

confidence: 99%

See 2 more Smart Citations

Zr‐MOF‐808 as Catalyst for Amide Esterification

Villoria‐del‐Álamo

Rojas‐Buzo

García‐García

et al. 2020

Chemistry A European J

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Section: Role Of Acid Sites In Mofs Catalytic Performancementioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Role Of Acid Sites In Mofs Catalytic Performancementioning

confidence: 99%

See 1 more Smart Citation

Zr‐MOF‐808 as Catalyst for Amide Esterification

Villoria‐del‐Álamo

Rojas‐Buzo

García‐García

et al. 2020

Chemistry A European J

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“…Moreover, it is possible that MOF-808 could also have missing linker defects, which would impact the reactivity of this material. 42 We have shown that a low barrier pathway for DMMP hydrolysis exists when there are two-adjacent missing linkers in UiO-67. It is not known experimentally whether these specific defect types exist, but theoretical work indicating that multiple missing linkers in a unit cell are energetically favored when they are localized (in the same tetrahedral cage) rather than being distributed.…”

Section: Resultsmentioning

confidence: 86%

Impact of defects on the decomposition of chemical warfare agent simulants in Zr‐based metal organic frameworks

Ruffley

Johnson

2021

AIChE Journal

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Metal organic frameworks (MOFs) containing zirconium secondary building units (SBUs) in UiO-67 and related MOFs, are highly active for neutralizing both the chemical warfare agents and simulants, such as dimethyl methylphosphonate (DMMP). However, two recent publications gave conflicting reports of DMMP reaction with UiO-67 under ultra high vacuum (UHV) conditions, with one reporting chemisorption and reaction (Wang et al.,

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“…MOF‐based materials, including pristine MOFs, MOF composites (e.g., C 3 N 4 /MOF composite, metal nanoparticles@MOF, and TiO 2 /MOF composite), and MOF‐derived materials are well studied for the catalysis purposes. For most MOFs are insulator, design MOF‐based materials as efficient catalysts for CO 2 reduction, their charge mobility, and electronic conductivity should be carefully considered.…”

Section: Synthetic Approaches For Mofsmentioning

confidence: 99%

MOFs‐Based Heterogeneous Catalysts: New Opportunities for Energy‐Related CO₂ Conversion

Lei

Xue

Chen

et al. 2018

Advanced Energy Materials

170

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www.advancedsciencenews.comreaction is more unfavorable. [22,23] Comparing to the researches on artificial H 2 production, the knowledge referring to efficient and selective reduction of CO 2 to energy-rich molecules is urgent to be updated. CO 2 conversion is often traced back to 1972 that reported by Honda and Fujishima with using inorganic photocatalysts TiO 2 . [24] As the capture of CO 2 has already been studied in metal-organic frameworks (MOFs), [25][26][27][28] it has recently been studied for their use as catalysts for the reduction of CO 2 into high-value chemicals. [14,29] MOFs hold great promise for applications in the field of CO 2 reduction, which can act directly as the catalysts or as components to promote CO 2 reduction in a hybrid catalytic system. The interior of MOFs can be designed to have open metal sites, specific heteroatoms, functionalized organic ligand, other building unit interactions, hydrophobicity, defects, porosity, and embedded nanoscale metal catalysts which is crucial for the development of better CO 2 reduction performance MOFs. [30][31][32] Due to the poor electron conductivity of MOFs, [33,34] and the inaccessibility of all the catalytic active sites to the reactants, the stability of MOFs in water and under UV light irradiation need to be further improved. We believe that a comprehensive and up-to-date review summarizing the recent applications of MOFs for CO 2 reduction will contribute to improve theoretical understanding of this field. In order to make a better achievement, it is necessary to use the MOF to build more complex materials to address CO 2 capacity and reduction ability together in one material. Future MOFs materials for CO 2 reduction should be economical and environmental friendly. The keys for promoting catalysis include structural defects in the MOFs, open metal sites from metal clusters, Lewis acid sites from the metal cluster and organometallic linker, and cocatalyst functionalized MOFs.Several reviews focusing on MOFs for CO 2 conversion have been recently reviewed and discussed. Dhakshinamoorthy et al. pointed out that photoexcitation of the light absorbing units in MOFs often generates a ligand-to-metal charge-separation state that can result in photocatalytic activity. Maina et al. discussed the corelationship between the properties of MOF materials including their CO 2 reduction catalytic performance under different reaction conditions. Li and co-workers have summarized the recent applications of MOFs for photocatalytic CO 2 reduction, in which MOFs can act as the photocatalysts for CO 2 reduction or as components in a hybrid photocatalytic system to promote CO 2 reduction. Yaghi and co-workers also pointed out that the challenge in developing catalysts for CO 2 photo-or electroreduction is rooted in the interplay between selectivity, activity, and efficiency. [35][36][37][38] Synthetic Approaches for MOFsMOFs, also called porous coordination polymers, are extended framework with open structures constructed from metal ions and organic ligands linked...

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Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks

Abstract: Defect-engineered Zr-MOF-808 are superior catalysts for Meerwein–Ponndorf–Verley reduction of (bulky) carbonyls.

Cited by 99 publications

References 36 publications

Zr‐MOF‐808 as Catalyst for Amide Esterification

Zr‐MOF‐808 as Catalyst for Amide Esterification

Impact of defects on the decomposition of chemical warfare agent simulants in Zr‐based metal organic frameworks

MOFs‐Based Heterogeneous Catalysts: New Opportunities for Energy‐Related CO₂ Conversion

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Catalytic properties of pristine and defect-engineered Zr-MOF-808 metal organic frameworks

Abstract: Defect-engineered Zr-MOF-808 are superior catalysts for Meerwein–Ponndorf–Verley reduction of (bulky) carbonyls.

Cited by 99 publications

References 36 publications

Zr‐MOF‐808 as Catalyst for Amide Esterification

Zr‐MOF‐808 as Catalyst for Amide Esterification

Impact of defects on the decomposition of chemical warfare agent simulants in Zr‐based metal organic frameworks

MOFs‐Based Heterogeneous Catalysts: New Opportunities for Energy‐Related CO2 Conversion

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Product

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MOFs‐Based Heterogeneous Catalysts: New Opportunities for Energy‐Related CO₂ Conversion