Recent Progress and Future Prospects on All-Organic Polymer Dielectrics for Energy Storage Capacitors

Chemical Reviews, Journal Year: 2021, Volume and Issue: 122(3), P. 3820 - 3878

Published: Dec. 23, 2021

With the development of advanced electronic devices and electric power systems, polymer-based dielectric film capacitors with high energy storage capability have become particularly important. Compared polymer nanocomposites widespread attention, all-organic polymers are fundamental been proven to be more effective choices in process scalable, continuous, large-scale industrial production, leading many applications. In past decade, efforts intensified this field great progress newly discovered polymers, production technologies, extension toward emerging computational strategies. This review summarizes recent based on conventional as well heat-resistant materials focus strategies enhance properties performances. The key parameters such constant, loss, breakdown strength, density, charge-discharge efficiency, thoroughly studied. addition, applications computer-aided calculation including density functional theory, machine learning, genome rational design performance prediction dielectrics reviewed detail. Based a comprehensive understanding developments, guidelines prospects for future proposed.

Language: Английский

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A Zeolitic‐Imidazole Frameworks‐Derived Interconnected Macroporous Carbon Matrix for Efficient Oxygen Electrocatalysis in Rechargeable Zinc–Air Batteries

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(28)

Published: June 2, 2020

Nanostructures derived from zeolitic-imidazole frameworks (ZIFs) gain much interest in bifunctional oxygen electrocatalysis. However, they are not satisfied well for long-life rechargeable zinc-air batteries due to the limited single particle morphology. Herein, preparation of an interconnected macroporous carbon matrix with a well-defined 3D architecture by pyrolysis silica templated ZIF-67 assemblies is reported. The catalyst assembled battery exhibits high power density 221.1 mW cm-2 as excellent stability during 500 discharging/charging cycles, surpassing that commercial Pt/C battery. synergistic effect structure together abundant cobalt-nitrogen-carbon active sites justify electrocatalytic activity and performance. Considering advanced nanostructures performance, as-synthesized hybrid would be promising other energy technologies. This work may also provide significant concept view electrocatalysis design

Language: Английский

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Low‐Cost Hypercrosslinked Polymers by Direct Knitting Strategy for Catalytic Applications

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(12)

Published: Dec. 6, 2020

Abstract Direct knitting of nucleophilic arene monomers in the presence electrophilic cross‐linker, like formaldehyde dimethyl acetal, is proven to be a cost‐effective and versatile method for synthesis porous organic polymers. The resulting hypercrosslinked polymers (HCPs) are featured by hierarchical structure, high surface area, pore volume. Coordinating functional groups can easily installed with this into rigid aryl network. HCPs has therefore been widely used preparing heterogeneous solid catalysts. Wise selection rational design 3D structure synergy between HCP support catalytically active species often lead efficiency tailor‐made catalysts without sophisticated operations. On account all these excellent properties, enthusiasm researchers use catalysis increasing rapidly. This review documents necessity, feasibility, great contributions using as invaluable tools research, summarizes state art chemistry. Similar type obtained one‐step Scholl reaction also included review.

Language: Английский

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Recent Developments of Microenvironment Engineering of Single‐Atom Catalysts for Oxygen Reduction toward Desired Activity and Selectivity

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(45)

Published: Aug. 7, 2021

Abstract Oxygen reduction reaction (ORR) is an essential process for sustainable energy supply and sufficient chemical production in modern society. Single‐atom catalysts (SACs) exhibit great potential on maximum atomic efficiency, high ORR activity, stability, making them attractive candidates pursuing next‐generation catalysts. Despite substantial efforts being made building diversiform single‐atom active sites (SAASs), the performance of obtained still unsatisfactory. Fortunately, microenvironment regulation SACs provides opportunities to improve activity selectivity ORR. In this review, first, mechanism pathways N‐coordinated SAAS, electrochemical evaluation, characterization SAAS are displayed. addition, recent developments tuning systematically summarized, especially, strategies modulation introduced detail boosting intrinsic 4e − /2e selectivity. Theoretical calculations cutting‐edge techniques united discussed fundamental understanding synthesis–construction–performance correlations. Furthermore, their comprehensively overviewed acquire outstanding SACs. Lastly, by proposing perspectives remaining challenges infant engineering, future directions other analogous procedures pointed out.

Language: Английский

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Creating High Regioselectivity by Electronic Metal–Support Interaction of a Single-Atomic-Site Catalyst

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(37), P. 15453 - 15461

Published: Sept. 10, 2021

Ligands are the most commonly used means to control regioselectivity of organic reactions. It is very important develop new regioselective methods for synthesis. In this study, we designed and synthesized a single-atomic-site catalyst (SAC), namely, Cu1-TiC, with strong electronic metal–support interaction (EMSI) effects by studying various reaction mechanisms. π cloud back-donation alkyne on metal catalytic intermediate was enhanced during using transient electron-rich characteristics. way, achieved highly linear-E-type conversion electronically unbiased alkynes completely avoided formation branched isomers (ln:br >100:1, TON up 612, 3 times higher than previously recorded). The structural elements SACs were following requirements synthesis mechanism. Every element in played an role This demonstrated that EMSI, which normally thought be responsible improvement efficiency durability heterogeneous catalysis, now first shows exciting potential regulating homogeneous catalysis.

Language: Английский

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Recent progress of metal-organic framework-derived composites: Synthesis and their energy conversion applications

Nano Energy, Journal Year: 2023, Volume and Issue: 111, P. 108415 - 108415

Published: April 5, 2023

Language: Английский

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Porous Ligand Creates New Reaction Route: Bifunctional Single-Atom Palladium Catalyst for Selective Distannylation of Terminal Alkynes

Chem, Journal Year: 2020, Volume and Issue: 6(9), P. 2300 - 2313

Published: July 29, 2020

Language: Английский

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Highly Efficient and Selective N‐Formylation of Amines with CO₂ and H₂ Catalyzed by Porous Organometallic Polymers

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 60(8), P. 4125 - 4132

Published: Nov. 17, 2020

Abstract The valorization of carbon dioxide (CO 2 ) to fine chemicals is one the most promising approaches for CO capture and utilization. Herein we demonstrated a series porous organometallic polymers could be employed as highly efficient recyclable catalysts this purpose. Synergetic effects specific surface area, iridium content, adsorption capability are crucial achieve excellent selectivity yields towards N‐formylation diverse amines with H under mild reaction conditions even at 20 ppm catalyst loading. Density functional theory calculations revealed not only redox‐neutral catalytic pathway but also new plausible mechanism incorporation key intermediate formic acid via proton‐relay process. Remarkably, record turnover number (TON=1.58×10 6 was achieved in synthesis N,N‐dimethylformamide (DMF), solid can reused up 12 runs, highlighting their practical potential industry.

Language: Английский

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Photocatalytic Overall Water Splitting Under Visible Light Enabled by a Particulate Conjugated Polymer Loaded with Palladium and Iridium**

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(26)

Published: April 4, 2022

Polymer photocatalysts have received growing attention in recent years for photocatalytic hydrogen production from water. Most studies report with sacrificial electron donors, which is unsuitable large-scale energy production. Here we show that the palladium/iridium oxide-loaded homopolymer of dibenzo[b,d]thiophene sulfone (P10) facilitates overall water splitting to produce stoichiometric amounts H

Language: Английский

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N-Heterocyclic carbenes and their precursors in functionalised porous materials

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(24), P. 13559 - 13586

Published: Jan. 1, 2021

Though N-heterocyclic carbenes (NHCs) have emerged as diverse and powerful discrete functional molecules in pharmaceutics, nanotechnology, catalysis over decades, the heterogenization of NHCs their precursors for broader applications porous materials, like metal-organic frameworks (MOFs), coordination polymers (PCPs), covalent-organic (COFs), organic (POPs), organometallic cages (POMCs) was not extensively studied until last ten years. By de novo or post-synthetic modification (PSM) methods, myriads containing building blocks were designed integrated into MOFs, PCPs, COFs, POPs POMCs to form various structures porosities. Functionalisation with significantly expands scope potential materials by tuning pore surface chemical/physical properties, providing active sites binding guest substrates realizing recyclability. In this review, we summarise discuss recent progress on synthetic structural features, promising functionalised materials. At end, a brief perspective encouraging future prospects challenges contemporary field is presented. This review will serve guide researchers design synthesize more novel precursors.

Language: Английский

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