Covalent‐Organic Frameworks (COFs) as Proton Conductors

Advanced Energy Materials, Год журнала: 2021, Номер 11(39)

Опубликована: Сен. 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.

Язык: Английский

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Porous organic polymers for high-performance supercapacitors

Chemical Society Reviews, Год журнала: 2022, Номер 51(8), С. 3181 - 3225

Опубликована: Янв. 1, 2022

This review summarizes recent advances and design strategies of porous organic polymers as efficient electrode materials for high-performance supercapacitors.

Язык: Английский

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The reformation of catalyst: From a trial-and-error synthesis to rational design

Nano Research, Год журнала: 2023, Номер 17(4), С. 3261 - 3301

Опубликована: Сен. 27, 2023

Язык: Английский

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Thermo-, Electro-, and Photocatalytic CO₂ Conversion to Value-Added Products over Porous Metal/Covalent Organic Frameworks

Accounts of Chemical Research, Год журнала: 2022, Номер 55(20), С. 2978 - 2997

Опубликована: Сен. 26, 2022

ConspectusThe continuing increase of the concentration atmospheric CO2 has caused many environmental issues including climate change. Catalytic conversion using thermochemical, electrochemical, and photochemical methods is a potential technique to decrease simultaneously obtain value-added chemicals. Due high energy barrier however, this method still far from large-scale applications which requires activity, selectivity, stability. Therefore, development efficient catalysts convert different products urgent. With their well-engineered pores chemical compositions, surface area, elevated adsorption capability, adjustable active sites, porous crystalline frameworks metal-organic (MOFs) covalent organic (COFs) are materials for catalytic conversion. Here, we summarize our recent work on MOFs COFs thermocatalytic, electrocatalytic, photocatalytic describe structure-activity relationships that could guide design effective catalysts.The first section paper describes imidazolium-functionalized MOFs, liquid cationic with nucleophilic halogen ions, can promote thermocatalytically cycloaddition reaction epoxides toward cyclic carbonates at one bar pressure. A MOF takes role reservoir tackle low local concentrations in gas-liquid-solid heterogeneous reactions. Imidazolium-functionalized ions avoid use cocatalysts, leads milder more facile experimental conditions separation processes.In dealing electrocatalytic reduction (CO2RR), developed series conductive framework fast electron transmission capabilities, afford current densities outperform traditional COF have been reported. The intrinsically two-dimensional 2D nanosheets based fully π-conjugated phthalocyanine motif excellent transport capability were prepared, strong transporters also integrated into metalloporphyrin-based CO2RR. Cu2O quantum dots Cu nanoparticles (NPs) be uniformly dispersed MOFs/COFs synergistic and/or tandem electrocatalysts, achieve highly selective production CH4 or C2H4 CO2RR.A third efforts facilitate electron-hole photocatalysis. Our focus regulation coordination spheres fabrication architecture heterojunctions, engineering films reduction.Finally, discuss several problems associated studies consider some prospects

Язык: Английский

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2D Conjugated Covalent Organic Frameworks: Defined Synthesis and Tailor-Made Functions

Accounts of Chemical Research, Год журнала: 2022, Номер 55(6), С. 795 - 808

Опубликована: Янв. 13, 2022

ConspectusCovalent organic frameworks (COFs) are an emerging class of crystalline porous polymers and have received tremendous attention research interest. COFs can be classified into two-dimensional (2D) three-dimensional (3D) analogues. Resembling the architectures graphene, 2D conjugated exhibited promising prospects in many fields, such as gas storage separation, heterogeneous catalysis, sensing, photocatalysis, environmental remediation, drug delivery, energy conversion, so forth. However, efficient structural design for high-throughput production remains challenging.In this Account, we summarize our recent contributions to design, synthesis, application exploration COFs. First, raised "two-in-one" strategy facile synthesis imine with good reproducibility solvent adaptability. Thanks elaborate molecular strategy, could easily modulate topology fabricate COF films. In addition, developed two approaches stabilize by using planar building blocks donor-acceptor structures. We also proposed a skeleton engineering electrode materials, through which redox-active orthoquinone moieties were stepwise-incorporated skeletons isostructural imine-linked This enabled systematic investigations on series analogous structures but different numbers active sites storage, provides platform unveil underlying structure-property relationships. recently new kind arylamine-linked The electroactive diphenylamine linkages endowed these extended conjugation improved stability, conferred excellent pseudocapacitive performance. Moreover, tailor-made sulfur-rich introduced that synthesized selective introduction polysulfide or sulfonyl groups used Li proton conduction. At end, key challenges toward practical applications their future suggested. hope Account will evoke inspirations innovative work field near future, especially some burgeoning interdisciplinary areas.

Язык: Английский

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