MXene chemistry, electrochemistry and energy storage applications

Nature Reviews Chemistry, Journal Year: 2022, Volume and Issue: 6(6), P. 389 - 404

Published: April 20, 2022

Language: Английский

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Fundamentals of MXene synthesis

Nature Synthesis, Journal Year: 2022, Volume and Issue: 1(8), P. 601 - 614

Published: Aug. 1, 2022

Language: Английский

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A Review on MXene Synthesis, Stability, and Photocatalytic Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 13370 - 13429

Published: Sept. 12, 2022

Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental energy crises. However, grafting of expensive less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice achieve enhanced photocatalytic performance owing ability extract electrons efficiently from enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, noble-metal-free composed earth-abundant elements considered noteworthy step toward considering photocatalysis more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, carbonitrides) shown huge potential alternatives for cocatalysts. several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, high specific surface area. In addition, they exhibit Gibbs free intermediate H atom adsorption close zero than that commercial Pt-based cocatalyst, Fermi level position above H2 generation potential, an capture activate molecules. Therefore, there growing interest in MXene-based various events. this review, we focus recent advances synthesis with 0D morphologies, stability MXenes, photocatalysts evolution, degradation. The challenges possible future directions enhance are also discussed.

Language: Английский

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High-Entropy 2D Carbide MXenes: TiVNbMoC₃ and TiVCrMoC₃

ACS Nano, Journal Year: 2021, Volume and Issue: 15(8), P. 12815 - 12825

Published: June 15, 2021

Two-dimensional (2D) transition metal carbides and nitrides, known as MXenes, are a fast-growing family of 2D materials. MXenes flakes have n + 1 (n = 1-4) atomic layers metals interleaved by carbon/nitrogen layers, but to-date remain limited in composition to one or two metals. In this study, implementing four metals, we report the synthesis multi-principal-element high-entropy M4C3Tx MXenes. Specifically, introduce TiVNbMoC3Tx TiVCrMoC3Tx, well their precursor TiVNbMoAlC3 TiVCrMoAlC3 MAX phases. We used combination real reciprocal space characterization (X-ray diffraction, X-ray photoelectron spectroscopy, energy dispersive scanning transmission electron microscopy) establish structure, phase purity, equimolar distribution MXene use first-principles calculations compute formation energies explore synthesizability these also show that when three instead four, under similar conditions those four-transition-metal phase, different phases can be formed (i.e., no pure single-phase forms). This finding indicates importance configurational entropy stabilizing desired over multiphases MAX, which is essential for phase-pure The significantly expands compositional variety further tune properties, including electronic, magnetic, electrochemical, catalytic, high temperature stability, mechanical behavior.

Language: Английский

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Defect engineering of two-dimensional materials for advanced energy conversion and storage

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(5), P. 1723 - 1772

Published: Jan. 1, 2023

Defective two-dimensional (2D) materials show huge potential for energy-related fields. This review overviews the formation/evolution mechanisms and engineering strategies of defects in 2D materials, which enable enhanced electrode reaction kinetics.

Language: Английский

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Superior Wear-Resistance of Ti₃C₂T_x Multilayer Coatings

ACS Nano, Journal Year: 2021, Volume and Issue: 15(5), P. 8216 - 8224

Published: April 6, 2021

Owing to MXenes' tunable mechanical properties induced by their structural and chemical diversity, MXenes are believed compete with state-of-the-art 2D nanomaterials such as graphene regarding tribological performance. Their nanolaminate structure offers weak interlayer interactions an easy-to-shear ability render them excellent candidates for solid lubrication. However, the acting friction wear mechanisms yet be explored. To elucidate these mechanisms, 100-nm-thick homogeneous multilayer Ti3C2Tx coatings deposited on technologically relevant stainless steel electrospraying. Using ball-on-disk tribometry (Si3N4 counterbody) contact pressures of about 300 MPa, long-term performance under dry conditions studied. MXene-coated specimens demonstrate a 6-fold reduction ultralow rate (4 × 10-9 mm3 N-1 m-1) over 100 000 sliding cycles, outperforming at least 200% life. High-resolution characterization verified formation beneficial tribolayer consisting thermally/mechanically degraded amorphous/nanocrystalline iron oxides. The transfer this counterbody transforms initial steel/Si3N4 tribolayer/tribolayer low shear resistance. MXene pileups track's reversal points continuously supply fresh, lubricious nanosheets, thus enabling ultra-wear-resistant low-friction

Language: Английский

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Perspectives of 2D MXene Tribology

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(5)

Published: Dec. 20, 2022

Abstract The large and rapidly growing family of 2D early transition metal carbides, nitrides, carbonitrides (MXenes) raises significant interest in the materials science chemistry communities. Discovered a little more than decade ago, MXenes have already demonstrated outstanding potential various applications ranging from energy storage to biology medicine. past two years witnessed increased experimental theoretical efforts toward studying MXenes’ mechanical tribological properties when used as lubricant additives, reinforcement phases composites, or solid coatings. Although research on understanding friction wear performance under dry lubricated conditions is still its stages, it has experienced rapid growth due excellent chemical reactivities offered by that make them adaptable being combined with other materials, thus boosting their performance. In this perspective, most promising results area MXene tribology are summarized, future important problems be pursued further outlined, methodological recommendations could useful for experts well newcomers research, particular, emerging tribology, provided.

Language: Английский

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Two-Dimensional Cobalt-Doped Ti₃C₂ MXene Nanozyme-Mediated Homogeneous Electrochemical Strategy for Pesticides Assay Based on In Situ Generation of Electroactive Substances

Analytical Chemistry, Journal Year: 2022, Volume and Issue: 94(8), P. 3669 - 3676

Published: Feb. 15, 2022

Common homogeneous electrochemical (HEC) sensors usually suffer from the drawbacks of high background signal, low signal-to-noise ratio, and even false positive results due to preaddition electroactive substances. Thus, it is necessary develop novel HEC based on in situ generation substances overcome these shortcomings, which, however, underexplored. In this work, two-dimensional (2D) nanozymes, i.e., cobalt-doped 2D Ti3C2 MXene nanosheets (CMNSs), with excellent peroxidase-like properties were utilized for organophosphate pesticides (OPs) detection. The CMNSs synthesized via a template-directed wet chemical approach displayed outstanding features hydrophilia water dispersibility, which could catalyze oxidation o-phenylenediamine (OPD) generate significantly increased reduction current. Interestingly, exhibited unique response thiol compounds thus employed as highly efficient catalysts OPs hydrolysis acetylthiocholine (ATCh) form thiocholine catalyzed by acetylcholinesterase (AChE) inhibition AChE activity OPs. recovery analysis pakchoi extract solutions ranged 97.4% 103.3%. as-proposed sensor will provide new way development high-performance demonstrate potential applicability determination pesticide residues real samples.

Language: Английский

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Layered 2D Nanomaterials to Tailor Friction and Wear in Machine Elements—A Review

Advanced Materials Interfaces, Journal Year: 2021, Volume and Issue: 9(3)

Published: Dec. 13, 2021

Abstract Recent advances in 2D nanomaterials, such as graphene, transition metal dichalcogenides, boron nitride, MXenes, allow not only to discover several new nanoscale phenomena but also address the scientific and industrial challenges associated with design of systems desired physical properties. One great for mechanical is addressing friction wear problems machine elements. In this review, beneficial properties layered materials that enable control their tribological behavior make them excellent candidates efficient reduction dry‐running boundary lubricated components are summarized. The recent studies highlighting successful implementation structures when used solid lubricant coatings or reinforcement phases composites various including sliding rolling bearings, gears, seals overviewed. examples presented demonstrate potential energy‐saving needs by reduction.

Language: Английский

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Biomedical Applications of MXene‐Integrated Composites: Regenerative Medicine, Infection Therapy, Cancer Treatment, and Biosensing

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(34)

Published: June 24, 2022

Abstract MXenes (viz., transition metal carbides, carbonitrides, and nitrides) have emerged as a new subclass of 2D materials. Due to their outstanding physicochemical biological properties, gained much attention in the biomedical field recent years, including drug delivery systems, regenerative medicine, biosensing. Additionally, incorporation into hydrogels has garnered significant interest engineering an electroactive mechanical nanoreinforcer capable converting nonconductive scaffolds excellent conductors electricity with impressive effect on properties for organs tissues such cardiac, skeletal muscle, nerve. However, many questions problems remain unresolved that need be answered usher these materials toward true destiny. Thus, this review paper aims provide overview design applications MXene‐integrated composites applications, cardiac tissue engineering, wound healing, infection therapy, cancer biosensors. Moreover, current challenges limitations utilizing vivo are highlighted discussed, followed by its prospects guideline possible various futuristic applications. This article will inspire researchers, who search opportunities, using nanomaterial

Language: Английский

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