Promoted Photocatalytic Hydrogen Evolution by Tuning the Electronic State of Copper Sites in Metal‐Organic Supramolecular Assemblies

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(47)

Published: Sept. 27, 2023

The electronic state in terms of charge and spin metal sites is fundamental to govern the catalytic activity a photocatalyst. Herein, we show that modulation states Cu sites, without changing coordination environments, two metal-organic supramolecular assemblies based on π⋅⋅⋅π stacking can significantly improve photocatalytic activity. use these heterogeneous photocatalysts, using noble cocatalysts, resulted an increase hydrogen production rate from 522 3620 μmol h-1 g-1 . A systematical analysis revealed density centers are efficiently modulated via fields around active copper (II) by variation non-coordination groups terminal ligands, leading significant enhancement This work provides insight into for designing high-performance photocatalysts.

Language: Английский

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Ultra‐high Capacity and Stable Dual‐ion Batteries with Fast Kinetics Enabled by HOF Supermolecules Derived 3D Nitrogen‐Oxygen Co‐doped Nanocarbon Anodes

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 14, 2024

Abstract The low capacity, poor cycling life, and rapid self‐discharge hinder the development of carbonaceous dual‐ion batteries (DIBs). Conventional preparations element doping amorphous carbons are cumbersome, complex, difficult to control element, content, size. Here, a nitrogen‐oxygen co‐doped carbon nanomaterial (NDC) with unique 3D vortex‐layered structure high content is ingeniously prepared via self‐assembly hydrogen‐bonded organic framework precursors followed by one‐step pyrolysis, then used for anodes DIBs. By pairing commercial Nylon separator, self‐supporting independent graphite cathode, high‐concentration electrolyte, NDC‐based DIBs display an ultra‐high specific discharge capacity up 519 mAh g −1 at 1 C, rate 0.85% h , retention 98.8% after 1500 cycles, fast kinetic dynamics. This study offers novel approach enable nanomaterials energy‐dense long‐cycling

Language: Английский

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Facile synthesis of a three-dimensional Ln-MOF@FCNT composite for the fabrication of a symmetric supercapacitor device with ultra-high energy density: overcoming the energy storage barrier

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(17), P. 7477 - 7497

Published: Jan. 1, 2024

A novel lanthanide MOF-FCNT composite is fabricated and employed as a symmetric supercapacitor (SSC) device with the highest energy density reported so far.

Language: Английский

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Non‐Resonant Structure Induces N‐Rich Solid Electrolyte Interface toward Ultra‐Stable Solid‐State Lithium‐Metal Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: March 19, 2024

Abstract The practical application of all‐solid‐state lithium metal batteries (ASSLMBs) is limited by (Li) anode instability including Li dendrite formation and deteriorating interface with electrolytes. Here, a functional additive, isosorbide mononitrate (ISMN) non‐resonant structure (O 2 −N−O−) reported, which improves its reactivity utilized to build stable N‐rich solid electrolyte interface, effectively alleviating side reactions for poly(vinylidene fluoride) (PVDF)‐lithium bis(trifluoromethane sulfonyl) imide (LiTFSI)‐based (PLE‐ISMN). In addition, the ion‐dipole interaction between ISMN ions facilitates dissociation LiTFSI form carrier ions, improving ionic conductivity (4.4 × 10 −4 S cm −1 ) transference number (0.50) PLE‐ISMN. Consequently, Li/Li symmetric cell delivers high critical current density 2.0 mA −2 stripping/plating cycling over 5000 h capacity 1.0 mAh . Moreover, Li|LiFePO 4 an excellent initial discharge 154.0 g outstanding retention 88.9% after 500 cycles at 0.5 C. Li|LiNi 0.8 Co 0.1 Mn O also exhibits good performance 4.4 V 1

Language: Английский

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Brain-specific targeted delivery of therapeutic agents using metal–organic framework-based nanomedicine

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 514, P. 215926 - 215926

Published: May 9, 2024

Language: Английский

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Single-ion conducting polymer electrolyte: A promising electrolyte formulation to extend the lifespans of LMBs

Nano Energy, Journal Year: 2024, Volume and Issue: 122, P. 109261 - 109261

Published: Jan. 5, 2024

Language: Английский

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Designing Cooperative Ion Transport Pathway in Ultra‐Thin Solid‐State Electrolytes toward Practical Lithium Metal Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Aug. 29, 2024

Solid polymer electrolytes (SPEs) are promising for high-energy-density solid-state Li metal batteries due to their decent flexibility, safety, and interfacial stability. However, development was seriously hindered by the instability limited conductivity, leading inferior electrochemical performance. Herein, we proposed design ultra-thin electrolyte with long-range cooperative ion transport pathway effectively increase ionic conductivity The impregnation of PVDF-HFP inside pores fluorinated covalent organic framework (CF

Language: Английский

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Confinement of p‐Xylene in the Pores of a Bilanthanide Metal–Organic Framework for Highly Selective Recognition

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 63(6)

Published: Dec. 13, 2023

The rapid and accurate sensing of p-xylene, an essential raw material with a multi-billion-dollar market, in xylene mixture is great significance industry; however, the highly similar molecular structures, energy levels, spectral characteristics isomers make selective recognition extremely challenging. Metal-organic frameworks (MOFs) exhibiting tailorable pores potential binding sites provide prospects for but comprehensive understanding pore effect still elusive, primarily due to intricacies involved process. Herein, we reported robust bilanthanide MOF NKU-999-EuTb precisely engineered accommodate which were confirmed by single crystal X-ray diffraction dynamic magnetic susceptibilities. exhibits high-performance p-xylene towards its isomers. Through systematical study, it was revealed that absorbing into governs performance. This work provides insights developing advanced materials complex

Language: Английский

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Hydrogen‐Bonded Organic Frameworks‐based Electrolytes with Controllable Hydrogen Bonding Networks for Solid‐State Lithium Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(41)

Published: July 22, 2024

The lack of stable solid-state electrolytes (SSEs) with high-ionic conductivity and the rational design electrode/electrolyte interfaces remains challenging for lithium batteries. Here, first time, a high-performance lithium-oxygen (Li-O

Language: Английский

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Constructing Donor–Acceptor-Linked COFs Electrolytes to Regulate Electron Density and Accelerate the Li+ Migration in Quasi-Solid-State Battery

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract Regulation the electronic density of solid-state electrolyte by donor–acceptor (D–A) system can achieve highly-selective Li + transportation and conduction in metal batteries. This study reports a high-performance thorough D–A-linked covalent organic frameworks (COFs) based on intramolecular charge transfer interactions. Unlike other reported COF-based electrolyte, developed concept with COFs not only achieves modulation to promote migration inhibit dendrite, but also offers crucial opportunity understand role The introduced strong electronegativity F-based ligand COF results (transference number 0.83), high ionic conductivity (6.7 × 10 –4 S cm −1 ), excellent cyclic ability (1000 h) symmetric cell high-capacity retention Li/LiFePO 4 (90.8% for 300 cycles at 5C) than substituted C- N-based ligands. is ascribed outstanding D–A interaction between donor porphyrin acceptor F atoms, which effectively expedites electron transferring from enhances kinetics. Consequently, we anticipate that this work creates insight into strategy accelerating batteries through system.

Language: Английский

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