Amorphous/Crystalline Heterostructure Transition-Metal-based Catalysts for High-Performance Water Splitting

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214916 - 214916

Published: Oct. 31, 2022

Language: Английский

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Recent advances in interface engineering strategy for highly‐efficient electrocatalytic water splitting

InfoMat, Journal Year: 2022, Volume and Issue: 5(1)

Published: Oct. 13, 2022

Abstract The hydrogen energy generated by the electrocatalytic water splitting reaction has been established as a renewable and clean carrier with ultra‐high density, which can well make up for shortcomings of conventional sources, such geographical limitations, climatic dependence, wastage. Notably, introduction electrocatalysts enhance efficiency process to generate hydrogen. Particularly, heterostructure constructed coupling multiple components (or phases) have emerged most promising option due well‐known electronic synergistic effects. existing reviews on interface engineering electrocatalyst design mostly focus relationship between heterostructures specific reactions. However, comprehensive overview integration model building, directional synthesis, mechanism rarely reported. To this end, in review, development catalysts is systematically introduced from perspective classification, growth regulation performance based interfacial microenvironment (bonding, configuration, lattice strain, etc.), thereby offering useful insights construction models. Besides, combined current applications strategies, challenges future are discussed relevant solutions proposed. Overall, review serve theoretical reference mechanism, further promote production technologies low consumption high yield. image

Language: Английский

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Recent Progress of Amorphous Nanomaterials

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(13), P. 8859 - 8941

Published: June 26, 2023

Amorphous materials are metastable solids with only short-range order at the atomic scale, which results from local intermolecular chemical bonding. The lack of long-range typical crystals endows amorphous nanomaterials unconventional and intriguing structural features, such as isotropic environments, abundant surface dangling bonds, highly unsaturated coordination, etc. Because these features ensuing modulation in electronic properties, display potential for practical applications different areas. Motivated by elements, here we provide an overview unique general synthetic methods, covered contemporary research nanomaterials. Furthermore, discussed possible theoretical mechanism nanomaterials, examining how properties configurations contribute to their exceptional performance. In particular, benefits well enhanced electrocatalytic, optical, mechanical thereby clarifying structure–function relationships, highlighted. Finally, a perspective on preparation utilization establish mature systems superior hierarchy various is introduced, outlook future challenges opportunities frontiers this rapidly advancing field proposed.

Language: Английский

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Interfacial component coupling effects towards precise heterostructure design for efficient electrocatalytic water splitting

Nano Energy, Journal Year: 2022, Volume and Issue: 103, P. 107753 - 107753

Published: Aug. 27, 2022

Language: Английский

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High‐Alkaline Water‐Splitting Activity of Mesoporous 3D Heterostructures: An Amorphous‐Shell@Crystalline‐Core Nano‐Assembly of Co‐Ni‐Phosphate Ultrathin‐Nanosheets and V‐ Doped Cobalt‐Nitride Nanowires

Advanced Science, Journal Year: 2022, Volume and Issue: 9(23)

Published: June 6, 2022

Introducing amorphous and ultrathin nanosheets of transition bimetal phosphate arrays that are highly active in the oxygen evolution reaction (OER) as shells over an electronically modulated crystalline core with low hydrogen absorption energy for excellent (HER) can boost sluggish kinetics OER HER alkaline electrolytes. Therefore, this study, cobalt-nickel-phosphate (CoNiPOx ) nanosheet deposited vanadium (V)-doped cobalt-nitride (V3% -Co4 N) nanowires to obtain amorphous-shell@crystalline-core mesoporous 3D-heterostructures @V-Co4 N/NF) bifunctional electrocatalysts. The optimized electrocatalyst shows extremely overpotentials 53 270 mV at 10 mA cm-2 , respectively. CoNiPOx @V3% N/NF (+/-) electrolyzer utilizing both anode cathode demonstrates remarkable overall water-splitting activity, requiring a cell potential only 1.52 V 30 lower than RuO2 /NF (+)/20%-Pt/C/NF (-) electrolyzer. Such impressive activities be attributed abundant sites, adjusted electronic structure, charge-transfer resistance, enhanced electrochemically surface area (ECSA), surface- volume-confined electrocatalysis resulting from synergistic effects V3% N boosting water splitting media.

Language: Английский

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Research Advances in Amorphous‐Crystalline Heterostructures Toward Efficient Electrochemical Applications

Small, Journal Year: 2022, Volume and Issue: 19(10)

Published: Dec. 16, 2022

Abstract Interface engineering of heterostructures has proven a promising strategy to effectively modulate their physicochemical properties and further improve the electrochemical performance for various applications. In this context related research newly proposed amorphous‐crystalline have lately surged since they combine superior advantages amorphous‐ crystalline‐phase structures, showing unusual atomic arrangements in heterointerfaces. Nonetheless, there been much less efforts systematic analysis summary examine complicated interfacial interactions elusory active sites. The critical structure‐activity correlation electrocatalytic mechanism remain rather elusive. review, recent advances energy conversion storage fields are amply discussed presented, along with remarks on challenges perspectives. Initially, fundamental characteristics introduced provide scientific viewpoints structural understanding. Subsequently, superiorities current achievements as highly efficient electrocatalysts/electrodes hydrogen evolution reaction, oxygen supercapacitor, lithium‐ion battery, lithium‐sulfur battery applications elaborated. At end future outlooks opportunities also put forward promote development application field clean energy.

Language: Английский

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Modulation of Phase Transition in Cobalt Selenide with Simultaneous Construction of Heterojunctions for Highly‐Efficient Oxygen Electrocatalysis in Zinc–Air Battery

Advanced Materials, Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 9, 2023

Abstract Phase transformation of cobalt selenide (CoSe 2 ) can effectively modulate its intrinsic electrocatalytic activity. However, enhancing electroconductivity and catalytic activity/stability CoSe still remains challenging. Heterostructure engineering may be feasible to optimize interfacial properties promote the kinetics oxygen electrocatalysis on a ‐based catalyst. Herein, heterostructure consisting nitride (CoN) embedded in hollow carbon cage is designed via simultaneous phase/interface strategy. Notably, phase transition orthorhombic‐CoSe cubic‐CoSe (c‐CoSe accompanied by situ CoN formation realized build c‐CoSe /CoN heterointerface, which exhibits excellent/highly stable activities for reduction/evolution reactions (ORR/OER). local coordination environment increase Co‐Se/N bond lengths. Theoretical calculations show that Co‐site with an electronic state near Fermi energy level main active site ORR/OER.Energetical tailoring d‐orbital structure Co atom incorporation lowers thermodynamic barriers ORR/OER. Attractively, zinc‐air battery ‐CoN cathode displays excellent cycling stability (250 h) charge/discharge voltage loss (0.953/0.96 V). It highlights heterointerface provides option modulating bifunctional activity metal selenides controlled transformation.

Language: Английский

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Atomic and Electronic Reconstruction in Defective 0D Molybdenum Carbide Heterostructure for Regulating Lower‐Frequency Microwaves

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: May 1, 2023

Abstract 0D nanomaterials with high efficiency of atom utilization possess extraordinary tunability over bulk materials. Precise reconstruction atoms in a nanoparticle toward tuning crystalline phases and defects is highly desirable but remains grand challenge. In this study, crystallization rate‐controlled strategy reported to achieve controllable situ, which inducts series monodisperse molybdenum carbide nanoparticles (Mo x C NP) that anchor on carbon matrix adjustable vacancies. Aberration‐corrected transmission electron microscopy, paramagnetic resonance technique, density functional theory calculation, holography jointly reveal the atomic process confirm its remarkable effects optimizing local electronic states enhancing heterointerface interactions. As result, optimized MoC/Mo 2 heterostructure shown enable promoted dielectric response generate more than 90% absorption lower‐frequency microwaves (the current 5 th ‐generation communication band). The control may provide an effective pathway for unlocking tunable properties various technological applications.

Language: Английский

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Tailoring the d‐Band Center over Isomorphism Pyrite Catalyst for Optimized Intrinsic Affinity to Intermediates in Lithium–Oxygen Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: Feb. 15, 2023

Abstract Rechargeable lithium–oxygen batteries (LOBs) are regarded as one of the most promising candidates for next generation energy storage devices. Nevertheless, lack understanding relationships between structure, property, and performance catalysts limits rational development efficient cathode catalysts, therefore, hinders commercial application LOBs. Herein, a d‐band center regulation strategy is proposed to construct an isomorphism composite NiS 2 ‐CoS @nitrogen‐doped carbon (NiS @NC) advanced catalyst boosting electrocatalytic activities Density functional theory calculations reveal that introduction Ni atoms not only redistributes internal charges on structure but also modulates adsorption capacities intermediates by tuning center, thus promoting oxygen reduction reaction/oxygen evolution reaction kinetics reducing overpotentials. As expected, @NC catalyzed LOBs present superior electrochemical including large initial discharge/charge specific capacity 14 551/13 563 mAh g −1 , ultralong cycle life over 490 cycles at current density 500 mA excellent rate performance. The insight into tailoring its facilitates construction electrocatalysts other systems.

Language: Английский

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Stabilizing Pt Single Atoms through Pt−Se Electron Bridges on Vacancy‐enriched Nickel Selenide for Efficient Electrocatalytic Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(39)

Published: July 28, 2023

Rational design of Pt single-atom catalysts provides a promising strategy to significantly improve the electrocatalytic activity for hydrogen evolution reaction. In this work, we presented novel and efficient utilizing low electron-density region substrate effectively trap confine high metal atoms. The catalyst supported by nickel selenide with rich vacancies was prepared via hydrothermal-impregnation stepwise approach. Through experimental testation DFT theoretical calculation, confirm that single atoms are well distributed at cationic loading amount 3.2 wt. %. Moreover, atomic combined electronegative Se form Pt-Se bond as "bridge" between fast electron translation. This shows an extremely overpotential 45 mV 10 mA cm-2 excellent stability over 120 h. Furthermore, SACs exhibits long-term practical application, which maintains current density 390 80 h retention 99 work points direction designing catalytic advanced green energy conversion technologies.

Language: Английский

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