Design Engineering, Synthesis Protocols, and Energy Applications of MOF-Derived Electrocatalysts

Nano-Micro Letters, Journal Year: 2021, Volume and Issue: 13(1)

Published: June 1, 2021

The core reactions for fuel cells, rechargeable metal-air batteries, and hydrogen production are the oxygen reduction reaction (ORR), evolution (OER), (HER), which heavily dependent on efficiency of electrocatalysts. Enormous attempts have previously been devoted in non-noble electrocatalysts born out metal-organic frameworks (MOFs) ORR, OER, HER applications, due to following advantageous reasons: (i) significant porosity eases electrolyte diffusion; (ii) supreme catalyst-electrolyte contact area enhances diffusion efficiency; (iii) electronic conductivity can be extensively increased owing unique construction block subunits MOFs-derived electrocatalysis. Herein, recent progress including synthesis protocols, design engineering, DFT calculations roles, energy applications is discussed reviewed. It concluded that elevated performances attributed an advantageously well-designed high-porosity structure, surface area, plentiful active centers. Furthermore, perspectives MOF-derived presented.

Language: Английский

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Regulation of Outer Solvation Shell Toward Superior Low‐Temperature Aqueous Zinc‐Ion Batteries

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(49)

Published: Sept. 30, 2022

Abstract Aqueous Zn‐ion batteries are well regarded among a next‐generation energy‐storage technology due to their low cost and high safety. However, the unstable stripping/plating process leading severe dendrite growth under current density temperature impede practical application. Herein, it is demonstrated that addition of 2‐propanol can regulate outer solvation shell structure Zn 2+ by replacing water molecules establish “eutectic shell”, which provides strong affinity with (101) crystalline plane fast desolvation kinetics during plating process, rendering homogeneous deposition without formation. As result, anode exhibits promising cycle stability over 500 h an elevated 15 mA cm −2 depth discharge 51.2%. Furthermore, remarkable electrochemical performance achieved in 150 mAh Zn|V 2 O 5 pouch cell 1000 cycles at −20 °C. This work not only offers new strategy achieve excellent aqueous harsh conditions, but also reveals electrolyte designs be applied related energy storage conversion fields.

Language: Английский

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Application of metal organic framework in wastewater treatment

Green Energy & Environment, Journal Year: 2022, Volume and Issue: 8(3), P. 698 - 721

Published: March 16, 2022

Water pollution is an increasingly serious environmental problem because many pollutants have carcinogenic effects on humans and aquatic organisms. Metal organic framework (MOF) made up of metal ions multifunctional ligands has been one the most concerned materials its adjustable regular pore structure. MOFs always shown attractive advantages in membrane separation adsorption technologies, among which water-stable are particularly prominent wastewater treatment (WWT) applications. This review systematically summarizes application MOF membranes filtration, pervaporation distillation. Also, mechanisms heavy metals, dyes antibacterials concluded. In order to tap full potential pristine sustainable treatment, current challenges discussed detail future research directions proposed.

Language: Английский

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Separation mechanism, selectivity enhancement strategies and advanced materials for mono-/multivalent ion-selective nanofiltration membrane

Advanced Membranes, Journal Year: 2022, Volume and Issue: 2, P. 100032 - 100032

Published: Jan. 1, 2022

Mono-/multivalent ion-selective separation has become a common requirement at the water-energy nexus, including energy storage and conversion, water purification, sustainable industrial processes. In this review, we summarize theory of ion transport through membrane mechanisms selective in nanofiltration (NF) briefly. Recent advancing improving mono-/multivalent selectivity thin-film composite (TFC) NF via size sieving enhancement, electric charge property regulation co-enhancement properties are concluded. What's more, three material classes—surface assembly materials, nanomaterials biomimetic channels highlighted as candidates for preparation membranes. Lastly, design directions critical challenges developing high-selectivity membranes based on provided.

Language: Английский

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Immobilized covalent triazine frameworks films as effective photocatalysts for hydrogen evolution reaction

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Nov. 15, 2021

Covalent triazine frameworks have recently been demonstrated as promising materials for photocatalytic water splitting and are usually used in the form of suspended powder. From a practical point view, immobilized CTFs more suitable large-scale splitting, owing to their convenient separation recycling potential. However, existing synthetic approaches mainly result insoluble unprocessable powders, which make future device application formidable challenge. Herein, we report an aliphatic amine-assisted interfacial polymerization method obtain free-standing, semicrystalline film with excellent photoelectric performance. The lateral size was up 250 cm2, average thickness can be tuned from 30 500 nm. structure confirmed by high-resolution transmission electron microscope, powder X-ray diffraction, grazing-incidence wide-angle scattering, small-angle scattering analysis. Intrigued good light absorption, crystalline structure, large film, on glass support exhibited hydrogen evolution performance (5.4 mmol h-1 m-2) presence co-catalysts i.e., Pt nanoparticles easy recycle.

Language: Английский

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Ultrathin Membranes for Separations: A New Era Driven by Advanced Nanotechnology

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: March 3, 2022

Ultrathin membranes are at the forefront of membrane research, offering great opportunities in revolutionizing separations with ultrafast transport. Driven by advanced nanomaterials and manufacturing technology, tremendous progresses made over last 15 years fabrications applications sub-50 nm membranes. Here, an overview state-of-the-art ultrathin is first introduced, followed a summary fabrication techniques emphasis on how to realize such extremely low thickness. Then, different types membranes, categorized based their structures, that is, network, laminar, or framework discussed focus interplays among structure, methods, separation performances. Recent research development trends highlighted. Meanwhile, performances current for representative (gas liquid separation) thoroughly analyzed compared. Last, challenges material design, structure construction, coordination given, order fully potential facilitate translation from scientific achievements industrial productions.

Language: Английский

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Porous organic polymers for Li-chemistry-based batteries: functionalities and characterization studies

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(8), P. 2917 - 2938

Published: Jan. 1, 2022

Porous organic polymers (POPs), a versatile class of materials that possess many tunable properties such as high chemical absorptivity and ionic conductivity, are emerging candidate electrode materials, permselective membranes, conductors, interfacial stabilizers functional precursors to synthesize advanced porous carbon. Based on their crystal structure features, the POPs can be classified into two subclasses: amorphous (hyper cross-linked polymers, with intrinsic microporosity, conjugated microporous aromatic frameworks, etc.) crystalline (covalent etc.). This tutorial review provides brief introduction different types in terms classification functions for tackling remaining challenges various Li-chemistry-based batteries. In situ ex characterization studies also discussed highlight importance applicability structural investigation reveal underlying mechanism over course electrochemical process. Although some revolutionary advances have been achieved, development batteries is still its infancy. Perspectives regarding future application mechanistic insights battery outlined at end.

Language: Английский

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Highly Ion-Permselective Porous Organic Cage Membranes with Hierarchical Channels

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(23), P. 10220 - 10229

Published: May 19, 2022

Membranes of high ion permselectivity are significant for the separation species at subnanometer scale. Here, we report porous organic cage (i.e., CC3) membranes with hierarchical channels including discrete internal cavities and cage-aligned external connected by subnanometer-sized windows. The windows CC3 sieve monovalent ions from divalent ones dual nanometer-sized provide pathways fast transport a flux 1.0 mol m-2 h-1 mono-/divalent selectivity (e.g., K+/Mg2+) up to 103, several orders magnitude higher than permselectivities reported membranes. Molecular dynamics simulations illustrate trajectory cavity via window, where migrate in diverse hydration states following energy barrier sequence K+ < Na+ Li+ ≪ Mg2+. This work sheds light on properties frameworks offers guidelines developing efficient separation.

Language: Английский

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The coming of age of water channels for separation membranes: from biological to biomimetic to synthetic

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(11), P. 4537 - 4582

Published: Jan. 1, 2022

Water channels are one of the key pillars driving development next-generation desalination and water treatment membranes. Over past two decades, rise nanotechnology has brought together an abundance multifunctional nanochannels that poised to reinvent separation membranes with performances exceeding those state-of-the-art polymeric within water-energy nexus. Today, these can be broadly categorized into biological, biomimetic synthetic, owing their different natures, physicochemical properties methods for membrane nanoarchitectonics. Furthermore, against backdrop mechanisms, types nanochannel exhibit unique merits limitations, which determine usability suitability designs. Herein, this review outlines progress a comprehensive amount nanochannels, include aquaporins, pillar[5]arenes, I-quartets, nanotubes porins, graphene-based materials, metal- covalent-organic frameworks, porous organic cages, MoS2, MXenes, offering comparative glimpse where potential lies. First, we map out background by looking evolution over years, before discussing latest developments focusing on intrinsic transport from chemistry standpoint. Next, put perspective fabrication nanoarchitecture high-performance nanochannel-enabled membranes, especially distinct differences each type how they leveraged unlock as-promised high in current mainstream Lastly, critically evaluate recent findings provide holistic qualitative assessment respect attributes most strongly valued engineering, upcoming challenges share our perspectives researchers pathing future directions coming age channels.

Language: Английский

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Bioinspired Tough Solid‐State Electrolyte for Flexible Ultralong‐Life Zinc–Air Battery

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(18)

Published: March 22, 2022

Manufacturing advanced solid-state electrolytes (SSEs) for flexible rechargeable batteries becomes increasingly important but remains grand challenge. The sophisticated structure of robust animal dermis and good water-retention plant cell in nature grant germane inspirations designing high-performance SSEs. Herein, tough bioinspired SSEs with intrinsic hydroxide ion (OH- ) conduction are constructed by situ formation OH- conductive ionomer network within a hollow-polymeric-microcapsule-decorated hydrogel polymer network. By virtue the design dynamic dual-penetrating structure, simultaneously obtain mechanical robustness 1800% stretchability, water uptake 107 g g-1 retention, superhigh conductivity 215 mS cm-1 . nanostructure SSE related ion-conduction mechanism revealed visualized molecular dynamics simulation, where plenty compact superfast ion-transport channels constructed, contributing to conductivity. As result, zinc-air assembled witness high power density 148 mW cm-2 , specific capacity 758 mAh ultralong cycling stability 320 h as well outstanding flexibility. methodology deep insight will shed light on energy conversion storage systems.

Language: Английский

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