Nanostructured molybdenum dichalcogenides: a review

Phalswal, Priyanka; Khanna, Pawan K.; Rubahn, Horst‐Günter; Mishra, Yogendra Kumar

doi:10.1039/d2ma00150k

Cited by 21 publications

(6 citation statements)

References 230 publications

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“…A van der Waals gap between the layers, affecting the electronic and optical properties of the material, is supported by experimental evidence, such as scanning tunneling microscopy and X-ray diffraction studies, which have shown a clear separation between the layers in TMDs [ 30 ]. On the other hand, some studies have suggested that there may be voids rather than a gap between the layers in TMDs.…”

Section: Introductionmentioning

confidence: 99%

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Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

et al. 2023

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The advent of new nanomaterials has resulted in dramatic developments in the field of energy production and storage. Due to their unique structure and properties, transition metal dichalcogenides (TMDs) are the most promising from the list of materials recently introduced in the field. The amazing progress in the use TMDs for energy storage and production inspired us to review the recent research on TMD-based catalysts and electrode materials. In this report, we examine TMDs in a variety of electrochemical batteries and solar cells with special focus on MoS2 as the most studied and used TMD material.

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Section: Introductionmentioning

confidence: 99%

“…Due to the weak bonds between adjacent layers, TMDs can be thinned down to single layers [ 27 , 28 ]. The weak interlayer adhesion is caused by the presence of a gap or voids between the layers and is still a matter of debate in the scientific community [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

et al. 2023

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“…Among the already discovered and intensely studied classes of 2D materials-such as special element allotropes [1,2], transition metal dichalcogenides [3,4], or MXenes [5,6]-the group of transition metal trihalides with 2D crystal structures hosts numerous compounds with unique and exotic properties, especially when their structures are scaled down to nanometer dimensions. To name just a few, RuCl 3 is featured in countless studies for its potential as a Kitaev quantum spin liquid ground state [7,8], CrX 3 (X = Cl, Br, I) exhibit interesting switches of their magnetic properties during downscaling [9][10][11], or the catalytic activity of TiCl 3 is to improved when downscaled [12].…”

Section: Introductionmentioning

confidence: 99%

Understanding the chemistry of 2D rhodium trihalide solid solutions: tuning of optical properties and nanocrystal deposition

et al. 2023

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In the search for novel 2D materials with potentially valuable properties, such as a tuneable band gap for optoelectronic or catalytic applications, solid solutions hold the potential to significantly expand the inventory of available 2D nanomaterials. In this study, we present for the first-time the synthesis of such 2D rhodium trihalide solid solutions: RhBr x Cl3−x and RhBr x I3−x . We use thermodynamic simulations and simultaneous thermal analysis to predict conditions for their rational synthesis and to investigate suitable chemical vapor transport (CVT) parameters for these solid solutions. The evolution of the lattice parameters is investigated by powder X-ray diffraction, showing an isostructural relationship of the synthesized compounds and only minor deviation from Vegard’s law. The optical band gap of these materials can be tuned in an energy range from 1.5 eV (RhCl3) to 1.2 eV (RhI3) by choosing the composition of the solid solution, while the samples also exhibit photoluminescence in similar energy ranges. Ultimately, the successful deposition of bulk as well as ultrathin 2D nanocrystals of RhBr x Cl3−x by CVT from 925 °C to 850 °C is shown, where the composition of the deposited crystals is precisely controlled by the choice of the starting composition and the initial amount of material. The high quality of the obtained nanocrystals is confirmed by atomic force microscopy, high resolution transmission electron microscopy and selected area electron diffraction. For RhBr x I3−x , the CVT from 900 °C to 825 °C is more difficult and has only been practically demonstrated for an exemplary case. According to the observed properties, these novel solid solutions and nanocrystals show a great potential for an application in optoelectronic devices.

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“…Recent studies address the fact that transitional metal chalcogenides, metal nitrides, and metal carbides have great benefits in HER due to their high activity, availability, and notable stability. − Specifically, molybdenum dichalcogenides (MDC, MoX 2 , X = S, Se, and Te) are decent examples of active electrocatalysts because of their structural morphology as well as chemical properties. , However, their catalytic efficiency is suffocated by two major limitations, i.e., less active edge parts or inactive basal sites and the weak electric transfer ability of the catalyst . To nullify these problems, researchers have focused on some important keys.…”

Section: Introductionmentioning

confidence: 99%

Phase Engineering of Molybdenum Dichalcogenide to Anion-Tunable Polyphasic Quaternary Chalcogenide (2H/1T/1T′) MoS_xSe_yTe_z (x + y + z = 2) Amplifies the Growth of H₂ Electrolytically

Sarkar

Sanyal

Chakraborty

et al. 2023

ACS Appl. Energy Mater.

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Herein, we report first anion-tunable quaternary molybdenum chalcogenides (QMC, MoS x Se y Te z , x + y + z = 2) with multiple phases [2H (29.7%), 1T (33.54%), 1T′ (36.76%)] for comparative hydrogen evolution reaction (HER) studies with molybdenum dichalcogenides (MDC) and ternary molybdenum chalcogenides (TMC). The multiple-phase inclusion with the help of incorporation of different chalcogen atoms in single catalysts is a significant aspect for producing green H 2 efficiently. QMC presents a superior response than MDC and TMC in acidic and PBS media due to binary to ternary phase transition. The optimal MoS 0.5 Se 1 Te 0.5 delivers admirable electrocatalytic activity (overpotential of 111 mV at 2 mA cm −2 , Tafel slope of 62 mV dec −1 , 96% Faradaic efficiency, 45 μmol h −1 ) in 0.5 M H 2 SO 4 with superb stability. Employing density functional theory over MoS 0.5 Se 1 Te 0.5 , the computed overpotential matches nicely with the experimental data, showing the ΔG value of ∼0.098 eV. The polytypic (2H/1T/1T′) phase consolidation modifies the electronic structure of Mo's d band and directly affects the growth of HER.

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Nanostructured molybdenum dichalcogenides: a review

Abstract: With increasing interests in transition metal dichalcogenides (TMDs), immense literature has come into existence covering broad range of preparation methods as well as applications in diverse fields. Often dichalcogenides include...

Cited by 21 publications

References 230 publications

Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

Understanding the chemistry of 2D rhodium trihalide solid solutions: tuning of optical properties and nanocrystal deposition

Phase Engineering of Molybdenum Dichalcogenide to Anion-Tunable Polyphasic Quaternary Chalcogenide (2H/1T/1T′) MoS_xSe_yTe_z (x + y + z = 2) Amplifies the Growth of H₂ Electrolytically

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Nanostructured molybdenum dichalcogenides: a review

Abstract: With increasing interests in transition metal dichalcogenides (TMDs), immense literature has come into existence covering broad range of preparation methods as well as applications in diverse fields. Often dichalcogenides include...

Cited by 21 publications

References 230 publications

Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

Transition-Metal Dichalcogenides in Electrochemical Batteries and Solar Cells

Understanding the chemistry of 2D rhodium trihalide solid solutions: tuning of optical properties and nanocrystal deposition

Phase Engineering of Molybdenum Dichalcogenide to Anion-Tunable Polyphasic Quaternary Chalcogenide (2H/1T/1T′) MoSxSeyTez (x + y + z = 2) Amplifies the Growth of H2 Electrolytically

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About

Phase Engineering of Molybdenum Dichalcogenide to Anion-Tunable Polyphasic Quaternary Chalcogenide (2H/1T/1T′) MoS_xSe_yTe_z (x + y + z = 2) Amplifies the Growth of H₂ Electrolytically