Advances in ionogels for proton-exchange membranes

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 921, P. 171099 - 171099

Published: Feb. 21, 2024

Language: Английский

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Unveiling the power of defect engineering in MOF-808 to enhance efficient carbon dioxide adsorption and separation by harnessing the potential of DFT analysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153049 - 153049

Published: June 12, 2024

Language: Английский

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Directed Regulation of Proton Transport Pathways in MOF-808

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 28, 2025

The directed regulation of proton transport pathways in conductors, facilitated by the well-defined crystal structures metal–organic frameworks (MOFs), is important for development advanced materials. In this study, MOF-808-2.5SO4-His synthesized progressive modification on framework using functional molecules. incorporation sulfate and imidazole groups into results a high conductivity 1.37 × 10–2 S cm–1 at 70 °C 98% relative humidity (RH). analysis temperature-dependent indicates that facilitates through Grotthuss mechanism RH temperature range 30–70 °C. Additionally, exhibits good cycling stability durability performance. This feasible approach enhances comprehension transfer promotes viable strategies controllable construction conductors.

Language: Английский

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Prominent Intrinsic Proton Conduction in Two Robust Zr/Hf Metal–Organic Frameworks Assembled by Bithiophene Dicarboxylate

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(23), P. 10786 - 10797

Published: May 21, 2024

To date, developing crystalline proton-conductive metal–organic frameworks (MOFs) with an inherent excellent proton-conducting ability and structural stability has been a critical priority in addressing the technologies required for sustainable development energy storage. Bearing this mind, multifunctional organic ligand, 3,4-dimethylthiophene[2,3-b]thiophene-2,5-dicarboxylic acid (H2DTD), was employed to generate two exceptionally stable three-dimensional porous Zr/Hf MOFs, [Zr6O4(OH)4(DTD)6]·5DMF·H2O (Zr-DTD) [Hf6O4(OH)4(DTD)6]·4DMF·H2O (Hf-DTD), using solvothermal means. The presence of Zr6 or Hf6 nodes, strong Zr/Hf–O bonds, electrical influence methyl group, steric effect thiophene unit all contribute their throughout wide pH range as well water. Their proton conductivity fully examined at various relative humidities (RHs) temperatures. Creating intricate rich H-bonded networks between guest water molecules, coordination solvent thiophene-S, –COOH, –OH units within framework assisted transfer. As result, both MOFs manifest maximum 0.67 × 10–2 4.85 10–3 S·cm–1 under 98% RH/100 °C, making them top-performing Zr/Hf-MOFs. Finally, by combining characteristics activation energies, potential conduction pathways were identified.

Language: Английский

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A Highly Stable Multifunctional Bi-Based MOF for Rapid Visual Detection of S^2– and H₂S Gas with High Proton Conductivity

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(26), P. 33865 - 33876

Published: June 21, 2024

Metal organic frameworks (MOFs) constructed with bismuth metal have not been widely reported, especially multifunctional Bi-MOFs. Therefore, developing MOFs is of great significance due to the increasing requirements materials. In this work, a 3D Bi-MOF (Bi-TCPE) multifunctionality was successfully constructed, demonstrating high thermal stability, water porous structure, and strong blue fluorescence emission. We evaluated properties Bi-TCPE in detecting anions (S2-, Cr2O72-, CrO42-) aqueous solution, along rapid visual detection H2S gas proton conduction. terms anion detection, achieved trace S2- solutions, while Ksv value 1.224 × 104 M-1 limit (LOD) 1.93 μM through titration experiments. Furthermore, could sensitively detect Cr2O72- CrO42-, values 1.144 1.066 M-1, respectively, LOD reached 2.07 2.18 μM. Subsequently, we conducted experiments, results indicated that selectively at extremely low concentrations (2.08 ppm) fast response time (<10 s). also observed significant color changes under both UV light sunlight. developed test paper for gas. Finally, conductivity Bi-TCPE, experimental showed 4.77 10-2 S·cm-1 98% RH 90 °C, achieving an excellent unmodified encapsulated MOFs. addition, stability conduction experiments (it remained stable after 21 consecutive days testing 12 cycles testing), relatively application value. These indicate MOF material potential.

Language: Английский

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High‐Strength MOF‐Based Polymer Electrolytes with Uniform Ionic Flow for Lithium Dendrite Suppression

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 10, 2024

Abstract The uneven formation of lithium dendrites during electroplating/stripping leads to a decrease in the utilization active lithium, resulting poor cycling stability and posing safety hazards battery. Herein, introducing 3D continuously interconnected zirconium‐based metal‐organic framework (MOF808) network into polyethylene oxide polymer matrix establishes synergistic mechanism for dendrite inhibition. MOF808 maintains its large pore structure, facilitating increased salt accommodation, expands anion adsorption at unsaturated metal sites through diverse large‐space cage thereby promoting flow Li + . Infrared‐Raman synchrotron small‐angle X‐ray scattering results demonstrate that transport behavior ion clusters MOF/polymer interface verifies local flux concentration, raising mobility number 0.42 ensuring uniform distribution, leading dendrite‐free homogeneous deposition. Furthermore, nanoindentation tests reveal high modulus elastic recovery MOF‐based electrolytes contribute forming robust, dendrite‐resistant interface. Consequently, symmetric battery systems, system exhibits minimal overpotential, merely 35 mV, while maintaining stable over 1800 h, achieving low–overpotential Moreover, it retains redox under voltages up 5.3 V.

Language: Английский

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Polyoxometalates loaded metal-organic frameworks as functional proton conductors for high-temperature proton exchange membrane fuel cells with high performance

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123981 - 123981

Published: March 1, 2025

Language: Английский

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Proton Conduction in Zirconium-Based Metal–Organic Frameworks for Advanced Applications

ACS Applied Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Zirconium-based metal-organic frameworks (Zr-MOFs) have emerged as a promising class of crystalline porous materials, attracting significant interest in the field proton conduction due to their exceptional chemical stability, structural flexibility, and functional tunability. Notably, proton-conducting Zr-MOFs show immense potential for diverse advanced technological applications. In this Spotlight on Applications paper, we provide an overview spotlight recent progress utilization exchange membranes membrane fuel cells (PEMFCs), light-responsive systems pumps, sensors formic acid detection. Furthermore, also discussed challenges, future prospects, opportunities promoting application Zr-MOFs.

Language: Английский

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Post‐synthetic modifications in metal–organic frameworks for high proton conductivity

Bulletin of the Korean Chemical Society, Journal Year: 2023, Volume and Issue: 45(2), P. 145 - 156

Published: Nov. 13, 2023

Abstract A myriad of metal ions and organic linkers can be used to produce metal–organic frameworks (MOFs) with varied functionalities, porosities, dimensionalities. Such diversity has garnered significant research interest, particularly in leveraging MOFs as proton conductors for fuel cells. One effective approach involves introducing guest molecules into MOF pores. These serve either carriers or proton‐conducting media through potential hydrogen bonding networks. This review offers an organized overview key methodologies historically employed achieve superprotonic conductivity MOFs. The article systematically categorizes these tactics three primary groups: molecule encapsulation, modulation at metal‐coordination sites, ligand functionalization. We succinctly discuss the roles carriers, conducting media, overall framework, emphasizing significance each strategy's application. In conclusion, we provide insights future development conductors, rooted categorization conceptual understanding strategies.

Language: Английский

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Incorporating flexible sulfonate-imidazolium ion pair-functionalized MOF in cross-linked polyvinyl alcohol membrane for achieving superprotonic conduction

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 480, P. 148146 - 148146

Published: Dec. 16, 2023

Language: Английский

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