Accelerated proton-coupled electron transfer kinetics of iron phthalocyanine for oxygen reduction via heteropoly blue clusters

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125080 - 125080

Опубликована: Янв. 1, 2025

Язык: Английский

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Polyoxometalates (POMs) as Proton Conductors

ACS Energy Letters, Год журнала: 2025, Номер unknown, С. 1958 - 1998

Опубликована: Март 27, 2025

The development of solid-state proton conductors (SSPCs) is significant interest for their deployment as exchange membranes in fuel cell (PEMFC) technology. aqueous medium synthesis with ample intrinsic sources has made crystalline polyoxometalates (POMs) promising SSPCs over others. Herein, we aim to showcase the solitary POMs and hybrids (with polymers MOFs/COFs) by organizing them based on approaches taken up (intrinsic or extrinsic) install various protonic while positioning within specific components POM frameworks. Particular attention paid a critical discussion whether conductivity purely combination other ionic (majorly originating from charge balancing counterions) thus recommend terminology be used. "Critical Discussion" section provides in-depth insights which are often overlooked, future recommendations "Future Outlook".

Язык: Английский

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Ultramicroporous Tröger's Base Framework Membranes With Ionized Sub‐nanochannels for Efficient Acid/Alkali Recovery

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Abstract Membrane technology holds significant potential for the recovery of acids and alkalis from industrial wastewater systems, with ion exchange membranes (IEMs) playing a crucial role in these applications. However, conventional IEMs are limited to separating only monovalent cations or anions, presenting challenge achieving concomitant H⁺/OH⁻ permselectivity simultaneous acid alkali recovery. To address this issue, charged microporous polymer framework developed, featuring rigid Tröger's Base network chains constructed through facile sol‐gel process. The intrinsic ultramicropore confinement quaternary ammonium‐charged functional groups provide ultrahigh size‐sieving capability enhanced Donnan exclusion selectivity; meanwhile, internal protoplasmic channels frameworks serve as highways rapid transfer. resulting membrane achieves high H⁺/Fe 2 ⁺ OH⁻/WO₄ ⁻ selectivities 694.4 181.0, respectively, concurrent separation diffusion dialysis electrodialysis processes over extended operational periods (exceeding 1600 600 h, respectively), while maintaining remarkable transport rates. These results outperform most literature‐reported nearly all commercially available membranes. This study validates novel applicability materials ionized angstrom‐scale versatile functionalities high‐performance acid/alkali resource

Язык: Английский

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Flexible supramolecular polymer proton conductors with high mechanical-conductive decoupling ability

Science China Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Язык: Английский

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Nafion Hybrid Membranes with Enhanced Ion Selectivity via Supramolecular Complexation for Vanadium Redox Flow Batteries

ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Язык: Английский

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Polyoxometalate–Polymer Composites with Distinct Compositions and Structures as High-Performance Solid Electrolytes

Inorganics, Год журнала: 2025, Номер 13(3), С. 75 - 75

Опубликована: Март 5, 2025

Solid electrolytes, including polymer are a promising option for improving the performance of environmentally friendly batteries such as rechargeable lithium-ion or fuel cells. Hydrogen–oxygen cells producing only water under power generation attracting widespread attention, and they need proton conductors electrolytes. Fluoropolymer electrolytes Nafion® have been utilized hydrogen–oxygen below 100 °C; however, not applicable over working temperature. Therefore, other types demanded Polyoxometalate (POM) inorganic clusters known to prepare POM–polymer composites solid electrolyte application. In composites, distinct compositions structures significant conductivity. Recently, with synthesized obtain high The key factor is use single-crystalline compounds. Here, several examples overviewed by classifying them into three categories: (i) (ii) organically modified POM (org-POM) polymers, (iii) hybrid polymers using polymerizable cations. application proton-conductive focused on.

Язык: Английский

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Membranes employed bowl-like porous organic molecules for fast ion-selective transport

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162434 - 162434

Опубликована: Апрель 1, 2025

Язык: Английский

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Harnessing Lithium‐Mediated Green Ammonia Synthesis with Water Electrolysis Boosted by Membrane Electrolyzer with Polyoxometalate Proton Shuttles

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Abstract Integrating water electrolysis (WE) with lithium‐mediated nitrogen reduction (Li‐NRR) offers a sustainable route for green ammonia production by directly utilizing protons from oxidation, eliminating reliance on grey or blue hydrogen. Here, polyoxometalates (POMs) function as electron‐coupled proton buffers (ECPBs) to seamlessly link WE Li‐NRR in three‐compartment flow reactor comprising an aqueous anode, organic cathode, and gas feed chamber. POMs serve shuttles while suppressing the competing hydrogen evolution reaction (HER), facilitating efficient synthesis. The addition of polymethyl methacrylate (PMMA) enhances catholyte hydrophobicity, mitigating contamination. By optimizing ECPB concentration, dynamic balance is achieved between lithium nitride intermediates (LiNxHy) formation consumption, yielding at 573.7 ± 5.2 µg h⁻¹ cm⁻ 2 Faradaic efficiency 54.2%. This design advances technology uniquely oxidation direct source, bypassing conventional methods. use establishes new benchmark production, reinforcing its potential chemistry.

Язык: Английский

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Asymmetric cation exchange membrane with short-range ion transport channels for electrodialysis

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 164135 - 164135

Опубликована: Май 1, 2025

Язык: Английский

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Upscaled Production of High-Performance Hollow ZSM-5 Zeolite Flow Battery Hybrid Membrane

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Май 29, 2025

Язык: Английский

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