An enhanced proton conductivity of proton exchange membranes by constructing proton-conducting nanopores using PVP-UiO-66-NH-SO3H nanoparticles

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 50, P. 1020 - 1035

Published: Oct. 17, 2023

Language: Английский

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Experimental and Theoretical Investigation of Anisotropic Proton Conduction in Two-Dimensional Metal–Organic Frameworks

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(46), P. 22194 - 22202

Published: Nov. 7, 2024

Two-dimensional (2D) materials are known for their potential to exhibit anisotropic transport properties due layered structures. However, the ion conduction of 2D metal–organic frameworks (MOFs) has been rarely explored. In this study, we investigated proton along in-plane and stacking directions two analogs undulating MOFs: [Mn(salen)]2[Pt(CN)4]·H2O (MnPt) [Mn(salen)]2[PtI2(CN)4]·H2O (MnPtI). This investigation was conducted using both experimental methods, involving single crystals, theoretical calculations. Compared relatively isotropic MnPt at 85 °C 95% relative humidity (RH), with a direction conductivity (σstacking) 1.8 × 10–5 S/cm, which is approximately 2.9 times (σin-plane), MnPtI exhibited highly conduction. The σstacking under same conditions (85 °C, RH) 1.5 10–4 83 higher than its σin-plane. Additionally, activation energy in ranged from 0.65 0.73 eV, 0.48 eV observed MnPt. Theoretical calculations confirmed that slight differences local structures, including node distortions between MnPtI, significantly influenced energies water migration. attributed formation hydrogen bonds layers molecules.

Language: Английский

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Cooperative defect engineering and ligand modification in UiO-66 to achieve high proton conductivity

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(53), P. 6777 - 6780

Published: Jan. 1, 2024

D-UiO-66-NIM with high proton conductivity has been synthesized through the dual strategy of defect engineering and ligand modification. Moreover, exhibits good temperature cycling stability durability in conductivity. This work developed a new method to obtain efficient MOF-based conductors.

Language: Английский

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Superprotonic Conductivity by Synergistic Blending of Coordination Polymers with Organic Polymers: Fabrication of Durable and Flexible Proton Exchange Membranes

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 27, 2024

Abstract Creation of an efficient and cost‐effective proton exchange membrane (PEM) has emerged as a propitious solution to address the challenges renewable energy development. Coordination polymers (CPs) have garnered significant interest due their multifunctional applications moldability, along with long‐range order. To leverage potential CPs in fuel cells, it is essential integrate microcrystalline into organic prepare membranes avoid grain boundary issues. In this study, we designed synthesized containing imidazole sulfonate moieties via gel‐to‐crystal transformation. The integration PVDF‐PVP matrix resulted superprotonic conductivity order 10 −2 S cm −1 at room temperature (30 °C) 98 % RH. achieved CP‐integrated composite was 4.69×10 80 °C RH, highest among all CP/MOF‐integrated under hydrous conditions. excellent compatibility produced highly flexible superior mechanical, chemical, thermal stability. About 25 times higher value membrane, compared intrinsic CPs, RT Thus, present mixed‐matrix long‐term durability for cutting‐edge cell

Language: Английский

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Symmetry related proton conductivity tunability via aliovalent metal substitution in imidazolium templated stable metal-organic framework hybrid membranes

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 680, P. 25 - 32

Published: Oct. 30, 2024

Language: Английский

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