Host-guest-induced electronic state triggers two-electron oxygen reduction electrocatalysis

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 25, 2024

Supramolecular polymers possess great potential in catalysis owing to their distinctive molecular recognition and dynamic crosslinking features. However, investigating supramolecular electrocatalysts with high efficiency oxygen reduction reaction hydrogen peroxide (ORHP) remains an unexplored frontier. Herein, we present organic for ORHP by introducing cyclodextrin-containing noncovalent building blocks, affording these supramolecules abundant bonds. The electronic states kinetics are further well-modulated via a host-guest strategy, resulting appropriate regional electron binding force controllable chemical activity. Notably, integrating units into phenyl group-containing model covalent polymer achieves production rate of 9.14 mol g

Language: Английский

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Harnessing MOF Intrinsic Properties for Enhanced Supercapacitor Performance

Current Opinion in Electrochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 101640 - 101640

Published: Jan. 1, 2025

Language: Английский

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Modulating the localized electronic distribution of Cu species during reconstruction for enhanced electrochemical CO₂ reduction to C₂₊ products

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(25), P. 15082 - 15089

Published: Jan. 1, 2024

ZrO 2 stabilized Cu + can optimize *CO adsorption and promote the following C–C coupling to achieve 70+% FE C 2+ in a wide potential range.

Language: Английский

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Linker Mediated Electronic‐State Manipulation of Conjugated Organic Polymers Enabling Highly Efficient Oxygen Reduction

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(26)

Published: April 19, 2024

Abstract Conjugated polymers with tailorable composition and microarchitecture are propitious for modulating catalytic properties deciphering inherent structure‐performance relationships. Herein, we report a facile linker engineering strategy to manipulate the electronic states of metallophthalocyanine conjugated uncover vital role organic linkers in facilitating electrocatalytic oxygen reduction reaction (ORR). Specifically, set cobalt phthalocyanine (CoPc‐CPs) wrapped onto carbon nanotubes (denoted CNTs@CoPc‐CPs) judiciously crafted via situ assembling square‐planar tetraaminophthalocyanine (CoPc(NH 2 ) 4 different linear aromatic dialdehyde‐based presence CNTs. Intriguingly, upon varying characteristic from terephthalaldehyde (TA) 2,5‐thiophenedicarboxaldehyde (TDA) then thieno/thiophene‐2,5‐dicarboxaldehyde (bTDA), their corresponding CNTs@CoPc‐CPs exhibit gradually improved ORR performance. More importantly, theoretical calculations reveal that charge transfer CoPc units electron‐withdrawing (i.e., TDA bTDA) drives delocalization Co d‐orbital electrons, thereby downshifting d‐band energy level. Accordingly, active centers more positive valence state optimized binding toward ORR‐relevant intermediates thus balanced adsorption/desorption pathway endows significant enhancement ORR. This work demonstrates molecular‐level route rationally designing efficient polymer catalysts gaining insightful understanding mechanisms.

Language: Английский

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Beyond conventional structures: emerging complex metal oxides for efficient oxygen and hydrogen electrocatalysis

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

The core of clean energy technologies such as fuel cells, water electrolyzers, and metal-air batteries depends on a series oxygen hydrogen-based electrocatalysis reactions, including the reduction reaction (ORR), evolution (OER) hydrogen (HER), which necessitate cost-effective electrocatalysts to improve their efficiency. In recent decade, complex metal oxides (beyond simple transition oxides, spinel ABO

Language: Английский

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Polymer Materials for Optoelectronics and Energy Applications

Materials, Journal Year: 2024, Volume and Issue: 17(15), P. 3698 - 3698

Published: July 26, 2024

This review comprehensively addresses the developments and applications of polymer materials in optoelectronics. Especially, this introduces how absorb, emit, transfer charges, including exciton–vibrational coupling, nonradiative radiative processes, Förster Resonance Energy Transfer (FRET), energy dynamics. Furthermore, it outlines charge trapping recombination draws corresponding practical implications. The following section focuses on application organic optoelectronics devices highlights detailed structure, operational principle, performance metrics photovoltaic cells (OPVs), light-emitting diodes (OLEDs), photodetectors, transistors detail. Finally, study underscores transformative impact evolution optoelectronics, providing a comprehensive understanding their properties, mechanisms, diverse that contribute to advancing innovative technologies field.

Language: Английский

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Synergistic O-Containing Triazine and Imidazole Linker in Covalent Organic Frameworks for Electrochemical Hydrogen Evolution

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Language: Английский

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Dynamic regulation of ferroelectric polarization using external stimuli for efficient water splitting and beyond

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Regulating the ferroelectric polarization in catalysts is an emerging strategy to advance water splitting reactions, with merits of high charge transfer rate, creation real active sites, and optimizing chemisorption energy.

Language: Английский

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Air-breathing cathode for aluminum–air battery: From architecture to fabrication and evaluation

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 163, P. 100942 - 100942

Published: Feb. 1, 2025

Language: Английский

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Probing Under‐Utilized Melem as Host Scaffold with Strategic Modulation of Cobalt Oxidation State to Accelerate Alkaline Water Splitting

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract The potential of cobalt catalysts for sustainable, carbon‐neutral hydrogen production through water splitting can be fully achieved by fundamental understanding‐driven strategic tuning metal oxidation states on a uniform scaffold. In pursuit stable scaffold that enhance electrocatalytic activity metal‐N synergism and envisaging g‐C 3 N 4 has inherited its properties from structurally distinct predecessor, Melem; comprehensive exploration s ‐heptazine (Melem, M ) is furnished as host electrocatalysts having variable states. Co(II)‐doped heptazine ( Co II @M catalyzed oxygen evolution reaction (OER) with an overpotential 302 mV achieving 50 mA cm −2 current density, minimal charge‐transfer resistance (0.41 Ω). Co(0)‐doped nanotube 0 facilitated the arduous H‐O‐H bond cleavage alkaline (HER), density at 206 overpotential, low 0.66 Ω, attesting to scaffold's assistance electron transfer. @M||Co assembly shows cell voltage (1.637 V @ 10 promising stability (114 h) total splitting. s‐ ensured finer dispersion stabilization active sites in corrosive environment. substantial stability, attributes nitrogen‐rich core extensive H‐bonding, unlocks under‐explored melem‐based systems applications.

Language: Английский

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