Hierarchical Pore Development by Plasma Etching of Zr‐Based Metal–Organic Frameworks

DeCoste, Jared B.; Rossin, Joseph A.; Peterson, Gregory W.

doi:10.1002/chem.201503632

Cited by 39 publications

(36 citation statements)

References 37 publications

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“…This stabilization was linked to strong adsorption of PFH and the reaction of CF 3 radical species in the cavities that prevented the formation of destructive water clusters. In a second study, the highly stable zirconium BDC framework UiO‐66 was used to rationalize the influence of plasma power and exposure time on the resulting material properties (5–60 min, 10–75 W and 30 Pa) . Next to the expected hydrophobization of the material, the progressive development of mesopores in the framework was observed (Figure ).…”

Section: Steps Forward In Vapor Depositionmentioning

confidence: 99%

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Vapor‐Phase Deposition and Modification of Metal–Organic Frameworks: State‐of‐the‐Art and Future Directions

Stassen

Vos

Ameloot

2016

Chemistry A European J

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Materials processing, and thin-film deposition in particular, is decisive in the implementation of functional materials in industry and real-world applications. Vapor processing of materials plays a central role in manufacturing, especially in electronics. Metal-organic frameworks (MOFs) are a class of nanoporous crystalline materials on the brink of breakthrough in many application areas. Vapor deposition of MOF thin films will facilitate their implementation in micro- and nanofabrication research and industries. In addition, vapor-solid modification can be used for postsynthetic tailoring of MOF properties. In this context, we review the recent progress in vapor processing of MOFs, summarize the underpinning chemistry and principles, and highlight promising directions for future research.

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Section: Steps Forward In Vapor Depositionmentioning

confidence: 99%

“…The treated material displays a significantly higher contact angle. b) Development of mesopores in the UiO‐66 framework by plasma etching (reproduced from reference ).…”

Section: Steps Forward In Vapor Depositionmentioning

confidence: 99%

Vapor‐Phase Deposition and Modification of Metal–Organic Frameworks: State‐of‐the‐Art and Future Directions

Stassen

Vos

Ameloot

2016

Chemistry A European J

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“…Decoste used to modify Zr-based MOFs by plasma in order to develop hierarchical pore structures. [71] As a consequence, the UiO-66 series of MOFs were etched by plasma with perfluoroalkanes and showed enhanced mass transferability toward detoxification reaction.…”

Section: Plasma Engravingmentioning

confidence: 99%

“…Plasma etched UiO-66, [71] CUMSs enriched ZIF-67. [14] Etched MOF for exposing This project aims to develop the design strategies of MOF-derived catalysts in order to move beyond the shortcoming of MOFs (e.g., poor conductivity, insufficient CUMSs exposure), at the same time, the electro-catalytic performance can benefit from their outstanding properties (e.g., atomically 36 dispersed metal centres, porous structure).…”

Section: Plasma Engravingmentioning

confidence: 99%

“…The surface areas estimated through Brunauer Emmett Teller (BET). In order to measure the OER activities of GO, The electrochemical impedance spectroscopy (EIS) of samples are recorded at a constant potential of 71 1.63 V vs RHE under OER conditions. According to the Nyquist plots of EIS ( Figure 5-7d), the charge transfer resistance of these composites have the same trend with their overpotential, which indicates the promotion of their charge transferability after intercalating GO.…”

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Metal-organic frameworks based materials for electro-catalysis

Jiang¹

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Nowadays, the growing utilisation of fossil fuel results in many environmental issues, including climate change and global warming. In order to meet energy consumption and provide sustainable resources for future generations, the development of hydrogen energy is highly desired as a renewable and clean alternative option.Currently, some studies of hydrogen production are based on water splitting; however, the conventional method is electricity-cost that is mainly due to the sluggish kinetics of its half-reaction, oxygen evolution reaction (OER). Thus, the catalyst of OER is demanded for the ideal efficiency and rational cost of hydrogen production. Noble metals, such as ruthenium (Ru) and iridium (Ir), usually Publications included in this thesistuning the coordinatively unsaturated metal sites of metal-organic framework by plasma engraving for enhanced electro-catalytic activity. ACS Appl. Mater. Interfaces 2019.

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Molecular Cleavage of Metal‐Organic Frameworks and Application to Energy Storage and Conversion

et al. 2021

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topology, and pore structure. This has led to research via various chemical approaches to control precisely chemical moieties within the structure of MOFs. [3] However, the direct (bottom-up) synthesis of MOFs from metal ions and ligands is not always feasible due to factors, including limited reactant concentration, lack of solvent, improper reaction temperature, and undesired side reactions. [4] Therefore, postsynthesis (top-down) methods are receiving increased research attention. This approach is seen as being flexible to modulate the structure of assynthesized MOFs. [5] For example, the synthesis of defects via missing clusters can regulate the pore volume of derived MOFs to boost CO 2 capture from flue gas. [6] Additionally, missing linkers not only create vacancy sites in MOF-808 (Zr 6 O 5 (OH) 3 (BTC) 2 (HCOO) 5 (H 2 O) 2 , BTC = 1,3,5-benzenetricarboxylate) and UiO-66 (University in Oslo, Zr 6 O 4 (OH) 4 (BDC) 6 , BDC = terephthalic acid) but introduce OH groups, which work as Brønsted bases to facilitate tertbutyl alcohol catalytic dehydration. [7] Weakening of the energy of metal-linker coordination bonds provides an opportunity to achieve postsynthesis of MOFs. [8] Using simple thermal pyrolysis, derivatives such as transitionmetal-based materials, single-atom catalysts, and carbon materials have been prepared for catalysis and energy-related applications. [9] However, the structure of MOFs is destroyed during many of these treatments. As a result, MOFs serve only as precursors for the derivatives rather than the direct active materials in catalytic application. [] Here, we focus on postsynthesis methods involving selective chemical bond cleavage to tailor composites and create new MOF structures. This method is advantageous because the reticular chemistry structure of the parent is not destroyed.Posttreatment of MOFs can be conveniently categorized as one of each of three distinct methods: 1) introduction of foreign metal ions or ligands into a pristine structure via exchange reactions; [4] 2) solvent-assisted incorporation of linkers on vacant/labile sites into the structure; [11] and 3) partial destruction to a new structure. [12] Generally, for the first two, the insertion of linkers with desired functional groups is not always trivial because these groups coordinate to metal sites during synthesis, losing functionalities. [13] The destruction of MOFs by cleavage of coordination bonds between metal and solvent molecules/linkers to precisely tune structures generates opening of metal sites, defects, hierarchical pores, orThe physicochemical properties of metal-organic frameworks (MOFs) significantly depend on composition, topology, and porosity, which can be tuned via synthesis. In addition to a classic direct synthesis, postsynthesis modulations of MOFs, including ion exchange, installation, and destruction, can significantly expand the application. Because of a limitation of the qualitative hard and soft acids and bases (HSAB) theory, posttreatment permits regulation of MOF structure by cleavi...

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Hierarchical Pore Development by Plasma Etching of Zr‐Based Metal–Organic Frameworks

Cited by 39 publications

References 37 publications

Vapor‐Phase Deposition and Modification of Metal–Organic Frameworks: State‐of‐the‐Art and Future Directions

Vapor‐Phase Deposition and Modification of Metal–Organic Frameworks: State‐of‐the‐Art and Future Directions

Metal-organic frameworks based materials for electro-catalysis

Molecular Cleavage of Metal‐Organic Frameworks and Application to Energy Storage and Conversion

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