Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(7), P. 3751 - 3891

Published: Feb. 25, 2021

Among the recent developments in metal-organic frameworks (MOFs), porous layered coordination polymers (CPs) have garnered attention due to their modular nature and tunable structures. These factors enable a number of properties applications, including gas guest sorption, storage separation gases small molecules, catalysis, luminescence, sensing, magnetism, energy conversion. MOFs, two-dimensional (2D) compounds are also known as 2D CPs or MOFs. Since discovery graphene 2004, materials been widely studied. Several MOFs suitable for exfoliation ultrathin nanosheets similar other materials, making these structures useful unique various technological applications. Furthermore, fascinating topological networks entanglements. This review provides an overview different aspects MOF architectures such topology, interpenetration, structural transformations, properties,

Language: Английский

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Non-Bonding Interaction of Neighboring Fe and Ni Single-Atom Pairs on MOF-Derived N-Doped Carbon for Enhanced CO₂ Electroreduction

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(46), P. 19417 - 19424

Published: Nov. 15, 2021

Single-atom catalysts (SACs), featuring high atom utilization, have captured widespread interests in diverse applications. However, the single-atom sites SACs are generally recognized as independent units and interplay of adjacent is largely overlooked. Herein, by direct pyrolysis MOFs assembled with Fe Ni-doped ZnO nanoparticles, a novel Fe1-Ni1-N-C catalyst, neighboring Ni pairs decorated on nitrogen-doped carbon support, has been precisely constructed. Thanks to synergism pairs, presents significantly boosted performances for electrocatalytic reduction CO2, far surpassing Fe1-N-C Ni1-N-C separate or single atoms. Additionally, also exhibits superior performance excellent CO selectivity durability Zn-CO2 battery. Theoretical simulations reveal that, Fe1-Ni1-N-C, atoms can be highly activated via non-bonding interaction, facilitating formation COOH* intermediate thereby accelerating overall CO2 reduction. This work supplies general strategy construct containing multiple metal species reveals vital importance communitive effect between toward improved catalysis.

Language: Английский

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Structural Transformation of Heterogeneous Materials for Electrocatalytic Oxygen Evolution Reaction

Chemical Reviews, Journal Year: 2021, Volume and Issue: 121(21), P. 13174 - 13212

Published: Sept. 15, 2021

Electrochemical water splitting for hydrogen generation is a promising pathway renewable energy conversion and storage. One of the most important issues efficient to develop cost-effective highly electrocatalysts drive sluggish oxygen-evolution reaction (OER) at anode side. Notably, structural transformation such as surface oxidation metals or metal nonoxide compounds amorphization some oxides during OER have attracted growing attention in recent years. The investigation will contribute in-depth understanding accurate catalytic mechanisms finally benefit rational design materials with high activity. In this Review, we provide an overview heterogeneous obvious electrocatalysis. To gain insight into essence transformation, summarize driving forces critical factors that affect process. addition, advanced techniques are used probe chemical states atomic structures transformed surfaces also introduced. We then discuss structure active species relationship between performance properties materials. Finally, challenges prospects electrocatalysis presented.

Language: Английский

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Recent advances in process engineering and upcoming applications of metal–organic frameworks

Coordination Chemistry Reviews, Journal Year: 2020, Volume and Issue: 426, P. 213544 - 213544

Published: Sept. 18, 2020

Language: Английский

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Metal–Organic Framework Based Hydrogen-Bonding Nanotrap for Efficient Acetylene Storage and Separation

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 144(4), P. 1681 - 1689

Published: Dec. 29, 2021

The removal of carbon dioxide (CO2) from acetylene (C2H2) is a critical industrial process for manufacturing high-purity C2H2. However, it remains challenging to address the tradeoff between adsorption capacity and selectivity, on account their similar physical properties molecular sizes. To overcome this difficulty, here we report novel strategy involving regulation hydrogen-bonding nanotrap pore surface promote separation C2H2/CO2 mixtures in three isostructural metal-organic frameworks (MOFs, named MIL-160, CAU-10H, CAU-23, respectively). Among them, which has abundant acceptors as nanotraps, can selectively capture molecules demonstrates an ultrahigh C2H2 storage (191 cm3 g-1, or 213 cm-3) but much less CO2 uptake (90 g-1) under ambient conditions. amount MIL-160 remarkably higher than those other two MOFs (86 119 g-1 CAU-10H respectively) same More importantly, both simulation experimental breakthrough results show that sets new benchmark equimolar terms potential (Δqbreak = 5.02 mol/kg) productivity (6.8 mol/kg). In addition, situ FT-IR experiments computational modeling further reveal unique host-guest multiple interaction key factor achieving extraordinary superior selectivity. This work provides powerful approach extremely gas separation.

Language: Английский

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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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Covalent‐Organic Frameworks (COFs) as Proton Conductors

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(39)

Published: Sept. 1, 2021

Abstract Proton conductivity is the paramount property of proton‐conducting materials that are playing significant roles in diverse electrochemical devices with applications proton exchange membranes (PEMs) for fuel cells (PEMFCs). Considering scarcity fossil fuels, development clean and green renewable energy resources in‐demand across globe. Toward this direction, solid‐state conductors interest. The higher structural tunability, lower density, good crystallinity, accessible well‐defined pores, excellent thermal chemical stability covalent‐organic frameworks (COFs) make them versatile platforms as both under hydrous anhydrous conditions. Taking advantage such superior properties, reports on COFs have been increasing swiftly since 2014, which demands a summarization comprehensive discussion “at glance” visualization further development. In review, showcased newer class material. A presented by organizing strategies taken to develop COFs. Establishment structure–function relationships implementation discussed well. Moreover, challenges future prospects elaborately critically analyzed.

Language: Английский

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Recent advances in the development of electronically and ionically conductive metal-organic frameworks

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 439, P. 213915 - 213915

Published: April 1, 2021

Language: Английский

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Lithium Extraction by Emerging Metal–Organic Framework‐Based Membranes

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(46)

Published: Aug. 7, 2021

Abstract Lithium is mainly extracted from brine and ores; however, current lithium mining methods require large amounts of chemicals, discharge many wastes, can have serious environmental repercussions. Metal–organic framework (MOF)‐based membranes shown great potential in extraction due to their uniform pore sizes, high porosities, rich host–guest chemistry compared other materials. In this review, the processes disadvantages technologies are introduced. The structure features corresponding design strategy MOFs suitable for Li + ion separations presented. Following, recent advances polycrystalline MOF membranes, mixed matrix channel lithium‐ion separation discussed detail. Finally, opportunities future developments challenges emerging research field

Language: Английский

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Proton-Conducting Hydrogen-Bonded Organic Frameworks

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(12), P. 4431 - 4453

Published: Nov. 19, 2021

Solid-state proton-conducting materials play essential roles in various electrochemical devices, including fuel cells as solid electrolytes. Recently, research on hydrogen-bonded organic frameworks (HOFs) has gained considerable momentum diverse applications, several of them show high stability with permanent microporosity. The inherent well-defined H-bonded networks HOFs make versatile platforms solid-state proton conductors exhibiting conductivities 10–1 S cm–1. In this Focus Review, we present the development while briefing early reports systems. Reports conductivity other terminologies, such supramolecular (SOFs), porous salts (POSs), or molecular crystals (PMCs), are also taken into consideration. All efforts have been made to organize and classify a deeper insight design principle critical features realizing conduction properties. advantages, potential challenges, prospects discussed.

Language: Английский

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