Construction of well interconnected metal-organic framework structure for effectively promoting proton conductivity of proton exchange membrane

Rao, Zhuang; Feng, Kai; Tang, Beibei; Wu, Peiyi

doi:10.1016/j.memsci.2017.03.031

Cited by 129 publications

(95 citation statements)

References 67 publications

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“…Additionally, Rao et al reported a GO-MOF hybrid membrane that was synthesized by tethering UiO-66-NH 2 onto GO surfaces, followed by incorporation into a Nafion matrix ( Figure 3b) [52]. The GO surface was first coated with polydopamine (PDA) by self-polymerization.…”

Section: Covalent Modifications On the Ligandsmentioning

confidence: 99%

“…Due to the exceptional water and thermal stability of GO-UiO-66-NH 2 , the hybrid membrane also had outstanding performance at high temperature and high humidity. Additionally, Rao et al reported a GO-MOF hybrid membrane that was synthesized by tethering UiO-66-NH2 onto GO surfaces, followed by incorporation into a Nafion matrix ( Figure 3b) [52]. The GO surface was first coated with polydopamine (PDA) by self-polymerization.…”

Section: Covalent Modifications On the Ligandsmentioning

confidence: 99%

“…Covalent bonds can exist in MOF hybrid materials made using this method but are not as common, so we include relevant examples in the "Covalent Modification" section (hybrids made from ALD and COF-MOF hybrids). Using this technique, metal clusters, metal oxides, graphene oxide, and polymers have been hybridized with MOFs, giving rise to new materials that are useful in gas separation, catalysis, photovoltaics, and proton conducting [52,53,56,[66][67][68][69]. The notation A|B|C is used to represent materials A, B, and C that are hybridized via layer-layer deposition.…”

Section: Layer-by-layer Depositionmentioning

confidence: 99%

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Metal–Organic Framework Hybrid Materials and Their Applications

et al. 2018

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The inherent porous nature and facile tunability of metal-organic frameworks (MOFs) make them ideal candidates for use in multiple fields. MOF hybrid materials are derived from existing MOFs hybridized with other materials or small molecules using a variety of techniques. This led to superior performance of the new materials by combining the advantages of MOF components and others. In this review, we discuss several hybridization methods for the preparation of various MOF hybrids with representative examples from the literature. These methods include covalent modifications, noncovalent modifications, and using MOFs as templates or precursors. We also review the applications of the MOF hybrids in the fields of catalysis, drug delivery, gas storage and separation, energy storage, sensing, and others. Crystals 2018, 8, 325 2 of 23to coordinate to other materials. In addition to covalent modifications, MOF hybrids can also be made via noncovalent interactions, such as encapsulation [19,20], layer-by-layer deposition [21], and in situ growth [22]. These methods take advantage of noncovalent interactions between MOFs and the hybridizing species by trapping the species within the MOF pores, layering them on top of the parent MOF, or growing MOFs crystals in situ with the species. Noncovalent modification allows the individual characteristics of the MOF and hybridizing materials to work synergistically in the resultant MOF hybrids while requiring less synthetic efforts than covalent modifications. These methods can be used to achieve materials with MOF coating/protection, multi-layered membranes, and the controlled growth of MOF structures with superior performance than individual parent materials. Finally, hybridizing MOFs through use as either sacrificial templates [23] or precursors [24] utilizes the ordered structure of MOFs to afford porous materials with high surface areas and uniform pore sizes. This method eliminates the metal node and/or the organic linker, leaving behind only the newly synthesized materials with the inherited uniform nanoframe of the template/precursor MOF.In this review, we discuss each hybridization method with representative MOF hybrids from literature, as well as the hybrid materials' superior performances and applications. At the end of this review, we also summarize all reported MOF hybrid materials. Crystals 2018, 8, x FOR PEER REVIEW 2 of 22

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Section: Covalent Modifications On the Ligandsmentioning

confidence: 99%

Section: Covalent Modifications On the Ligandsmentioning

confidence: 99%

Section: Layer-by-layer Depositionmentioning

confidence: 99%

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Metal–Organic Framework Hybrid Materials and Their Applications

et al. 2018

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“…Metal‐organic frameworks (MOF) have been used in various fields such as catalysis, separation, adsorption, and drug delivery, etc . Recently, MOFs were utilized as proton conductors in the field of energy material . Different types of MOF with high proton‐conducting properties were reported.…”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13][14] Recently, MOFs were utilized as proton conductors in the field of energy material. [15][16][17][18] Different types of MOF with high proton-conducting properties were reported. In MOF, protons can be transferred in two ways: (a) it can transport via the hydrogenbonded networks 19,20 and/or, (b) transport through carriers loaded in the pores of MOF.…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of sulfonated polymer membrane by using sulfonic acid functionalized hetero‐metallic metal‐organic framework for DMFC applications

et al. 2019

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Summary Proton transport played a crucial part in the fuel cells, sensors, and batteries. The electrolyte used in fuel cells should possess high proton conductivity and good chemical stability. Herein, taking advantage of the high proton conductivity of metal‐organic framework (MOF) and the good chemical stability of branched polymers, a new heterometallic mediated MOF (Zr‐Cr‐SO3H) is synthesized and utilized as a filler in the highly branched sulfonated polymer (BSP). In addition, Zr‐SO3H MOF is also prepared for comparison. Transmission electron microscope study shows that the prepared MOF particles are spherical in size and interconnected through nanosheets. The optimized quantity of MOFs inside the polymer matrix improves the water sorption, mechanical property, and proton conductivity. The composite membranes display an improved open‐circuit voltage than the pristine BSP membrane. By comparing the Zr‐SO3H MOF incorporated composite membrane, Zr‐Cr‐SO3H MOF incorporated composite membranes display higher proton conductivity and peak power density in a single‐cell test. In particular, the single‐cell fabricated with Zr‐Cr‐SO3H MOF incorporated composite membrane is able to reach the peak power density of 64.6 mWcm−2 at 60°C, which is 26% greater than the Nafion 212 membrane. Furthermore, this work offers a new strategy for the utilization of hetero‐metal MOF as a filler for proton exchange membrane applications.

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