Two-Dimensional Carbon-Rich Conjugated Frameworks for Electrochemical Energy Applications

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(30), P. 12903 - 12915

Published: July 6, 2020

Following a 15-year-long investigation on graphene, two-dimensional (2D) carbon-rich conjugated frameworks (CCFs) have attracted growing research interest as new generation of multifunctional materials. Typical 2D CCFs include π-conjugated polymers (also classified covalent organic frameworks) and metal-organic frameworks, which are characterized by layer-stacked periodic with high in-plane π-conjugation. These unique structures endow regular porosities, large specific surface areas, superior chemical stability. In addition, exhibit certain notable properties (e.g., excellent electronic conductivity, designable topologies, defined catalytic/redox-active sites), motivated increasing efforts to explore for electrochemical energy applications. this Perspective, the structural features synthetic principles briefly introduced. Moreover, we discuss recent achievements in designed various conversion (electrocatalysis) storage (supercapacitors batteries) Particular emphasis is placed analyzing precise regulation CCFs. Finally, provide an outlook about future development applications, concerns novel monomer design, methodology/strategy establishment, roadmap toward practical

Language: Английский

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Conductive CuCo‐Based Bimetal Organic Framework for Efficient Hydrogen Evolution

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(49)

Published: Oct. 8, 2021

Metal-organic frameworks (MOFs) with intrinsically porous structures and well-dispersed metal sites are promising candidates for electrocatalysis; however, the catalytic efficiencies of most MOFs significantly limited by their impertinent adsorption/desorption energy intermediates formed during electrocatalysis very low electrical conductivity. Herein, Co is introduced into conductive Cu-catecholate (Cu-CAT) nanorod arrays directly grown on a flexible carbon cloth hydrogen evolution reaction (HER). Electrochemical results show that Co-incorporated Cu-CAT only need 52 143 mV overpotentials to drive current density 10 mA cm-2 in alkaline neutral media HER, respectively, much lower than reported non-noble metal-based electrocatalysts comparable benchmark Pt/C electrocatalyst. Density functional theory calculations introduction can optimize adsorption (ΔGH* ) Cu sites, almost close Pt (111). Furthermore, water ( ΔEH2O CuCo-CAT upon coupling Co, effectively accelerating Volmer step HER process. The findings, synergistic effect bimetals, open new avenue rational design highly efficient MOF-based electrocatalysts.

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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Current Progress in 2D Metal–Organic Frameworks for Electrocatalysis

Small Structures, Journal Year: 2022, Volume and Issue: 4(6)

Published: Sept. 16, 2022

The 2D nanosheets of metal–organic frameworks (MOFs) have recently emerged as a promising material that makes them valuable in widespread electrocatalytic fields due to their atomic‐level thickness, abundant active sites, and large surface area. Efficient electrocatalysts for hydrogen evolution reaction (HER), oxygen (OER), overall water splitting are highly desired with low overpotentials promote the industrial applications energy conversion devices. MOF nanostructures provide long‐term stability high electrical conductivity enhance catalyst activity durability. This review briefly summarizes synthesis HER/OER/water splitting. More attention is focused on synthetic strategies derivatives. catalytic performance superior properties these materials highlighted. outperformance originates from rational design, myriad thickness. current future challenges this field scientific perspectives overcome It suggested construction can develop state‐of‐the‐art electrocatalyst environmental division.

Language: Английский

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Two-Dimensional Conjugated Metal–Organic Frameworks for Electrocatalysis: Opportunities and Challenges

ACS Nano, Journal Year: 2022, Volume and Issue: 16(2), P. 1759 - 1780

Published: Jan. 20, 2022

A highly effective electrocatalyst is the central component of advanced electrochemical energy conversion. Recently, two-dimensional conjugated metal-organic frameworks (2D c-MOFs) have emerged as a class promising electrocatalysts because their advantages including 2D layered structure with high in-plane conjugation, intrinsic electrical conductivity, permanent pores, large surface area, chemical stability, and structural diversity. In this Review, we summarize recent advances c-MOF for First, introduce design principles synthetic strategies reported c-MOFs, well functional electrocatalysis. Subsequently, present representative in various reactions, such hydrogen/oxygen evolution, reduction reactions oxygen, carbon dioxide, nitrogen. We highlight property tuning to boost catalytic performance, offer our perspectives regard challenges be overcome.

Language: Английский

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Metal organic frameworks as electrocatalysts: Hydrogen evolution reactions and overall water splitting

International Journal of Hydrogen Energy, Journal Year: 2021, Volume and Issue: 46(17), P. 10216 - 10238

Published: Jan. 13, 2021

Language: Английский

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Metal–organic frameworks and derived materials as photocatalysts for water splitting and carbon dioxide reduction

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 469, P. 214664 - 214664

Published: June 24, 2022

Language: Английский

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Synergetic Cobalt‐Copper‐Based Bimetal–Organic Framework Nanoboxes toward Efficient Electrochemical Oxygen Evolution

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(50), P. 26397 - 26402

Published: Oct. 20, 2021

The development of efficient oxygen electrocatalysts and understanding their underlying catalytic mechanism are significant importance for the high-performance energy conversion storage technologies. Herein, we report novel CoCu-based bimetallic metal-organic framework nanoboxes (CoCu-MOF NBs) as promising catalysts toward electrochemical evolution reaction (OER), fabricated via a successive cation ligand exchange strategy. With highly exposed bimetal centers well-designed architecture, CoCu-MOF NBs show excellent OER activity stability, with small overpotential 271 mV at 10 mA cm-2 high turnover frequency value 0.326 s-1 an 300 mV. In combination quasi in situ X-ray absorption fine structure spectroscopy density-functional theory calculations, post-formed oxyhydroxide analogue during is believed to account NBs, where electronic synergy between Co neighbouring Cu atoms promotes O-O bond coupling fast kinetics.

Language: Английский

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Engineering the Coordination Environment of Single Cobalt Atoms for Efficient Oxygen Reduction and Hydrogen Evolution Reactions

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(8), P. 4498 - 4509

Published: March 29, 2021

The coordination environment of single-atom catalysts (SACs) plays a crucial role in determining the energy conversion efficiency related electrochemical devices. Herein, series Co-based SACs (Co1-SACs) was tuned to correlate chemical structures these with their electrocatalytic performance. optimized Co1-SACs containing Co-S2N2 sites are electrocatalytically active both oxygen reduction reaction (ORR) and hydrogen evolution (HER), which were carried out alkaline media. exhibit high ORR activity, an onset potential 0.99 V vs RHE good stability, as well have promising application zinc-oxygen battery power density (260 mW cm–2) open-circuit voltage (1.50 V), remarkable tolerance large current density, long-term operation. site is attributed electron Co atom through its cocoordination adjacent S N atoms. Moreover, efficiently catalyze HER, exhibiting low overpotential (121 mV at 20 mA cm–2), Tafel slope (47 dec–1), stability. This work also provides facile heteroatom-doping strategy engineer desired environments for efficient electrocatalysis.

Language: Английский

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The Synthesis of Hexaazatrinaphthylene‐Based 2D Conjugated Copper Metal‐Organic Framework for Highly Selective and Stable Electroreduction of CO₂ to Methane

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(30), P. 16409 - 16415

Published: May 9, 2021

Abstract 2D conjugated MOFs have attracted significant interests in recent years owing to their special structural features and promising physical chemical properties. These intriguing attributes, a large extent, stem from the nature of incorporated ligands. The available ligands for construction are still limited, especially those that heteroatoms included exposed pores. In this work, we designed synthesized highly symmetric hexaazatrinaphthylene (HATNA)‐based ligand with two different coordination sites. Through selective coordination, crystalline porous copper metal‐organic framework was constructed. Due synergic effects HATNA catecholate node, HATNA‐based MOF can mediate electrocatalytic reduction CO 2 methane high selectivity 78 % at current density 8.2 milliamperes per square centimetre (mA cm −2 ) long durability over 12 hours.

Language: Английский

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