Hydrogenation-controlled phase transition on two-dimensional transition metal dichalcogenides and their unique physical and catalytic properties

Qu, Yuanju; Pan, Hui; Kwok, Chi Tat

doi:10.1038/srep34186

Cited by 71 publications

(49 citation statements)

References 68 publications

(117 reference statements)

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“…12,13 Such distinguishing properties surely make ReS 2 attractive for spintronic devices but remain scant, due to the nonmagnetic nature of ReS 2 . 14,15 Chemical doping is known to be an effective and convenient approach to modify the properties of 2D materials, and has been an essential approach for functionalization. Doping TMDs with transition metal atoms has been reported to change electronic properties and enhance the catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doping induces tunable magnetism in ReS2

Zhang

Ren

et al. 2018

npj 2D Mater Appl

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Transition metal dichalcogenides (TMDs) are promising for spintronic devices owing to their spin-orbit coupling and loss of inversion symmetry. However, further development was obstructed by their intrinsic nonmagnetic property. Doping TMDs with non-metal light atoms has been predicted to be a good option to induce unexpected magnetic properties which remain rarely explored. Here, we utilize nitrogen doping to introduce magnetic domains into anisotropic ReS 2 , giving rise to a transition from nonmagnetic to tunable magnetic ordering. Both of the experimental and computational results confirmed that the N-doping in ReS 2 prefers to take place at the edge site than in-plane site. With controlled doping concentration, it exhibits a unique ferromagnetic-antiferromagnetic (FM-AFM) coupling. Assisted by theoretical calculations, we demonstrated that FM-AFM coupling presents a strong link to doping contents and doping sites. Wherein, the FM ordering mostly comes from N atoms and the AFM ordering originate from Re atoms. At the N-doping content of 4.24%, the saturated magnetization of N-doped ReS 2 reached the largest value of 2.1 emu g −1 at 2 K. Further altering the content to 6.64%, the saturated magnetization of N-doped ReS 2 decreases, but exhibits a distinct exchange bias (EB) phenomenon of around 200 Oe. With controlled N-doping concentrations, the intrinsic spin in ReS 2 could be well altered and resulted in distinct magnetism, presenting tremendous potential for spintronic devices in information storage.

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Section: Introductionmentioning

confidence: 99%

Nitrogen-doping induces tunable magnetism in ReS2

Zhang

Ren

et al. 2018

npj 2D Mater Appl

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“…d) Summary of properties of 33 TMD monolayers with and without hydrogenation. Reproduced under the terms of the Creative Commons Attribution 4.0 International License . Copyright 2016, the Authors, published by Springer Nature.…”

Section: Strategies On Triggering Phase Transition In Tmdsmentioning

confidence: 99%

Strategies on Phase Control in Transition Metal Dichalcogenides

Wang

Zhou

et al. 2018

Adv Funct Materials

108

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Transition metal dichalcogenides (TMDs) consist of dozens of ultrathin layered materials that have significantly different properties due to their varied phases, which determine the properties and application range of TMDs. Interestingly, a controllable phase transition in TMDs is achieved extensively with the use of several methods. Thus, phase control is a promising way to fully exploit the potential of TMDs. This review introduces the recent rapid development of the study of the TMD phase control, starting from the basic conception of the phase and phase transition in TMDs to the strategies for obtaining phase control. The different strategies are roughly classified into several types based on their characteristics: doping, synthesis method, strain, thermal method, and interlayer coupling. Finally, an evaluation on the prospect of the emergent strategies is provided.

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“…Within a broad space of materials that have been explored for electrocatalytic applications, several 2D and quasi‐2D structures have recently been reported to exhibit superior properties for the hydrogen evolution reaction and other core electrochemical reactions . In particular, molybdenum disulfide (MoS 2 ) and a few members of transition metal dichalcogenides (TMDCs) in contact with ionic‐liquid (IL) electrolyte have recently shown a great promise to overcome fundamental electronic and thermokinetic limitations for CO 2 reduction reaction, as well as the oxygen reduction and evolution reactions (ORR/OER) .…”

Section: Driving Forces (δG) Reorganization Energies (λ) Activationmentioning

confidence: 99%

New Class of Electrocatalysts Based on 2D Transition Metal Dichalcogenides in Ionic Liquid

et al. 2018

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electrochemical reactions. [1][2][3][4][5][6][7][8][9][10][11] In particular, molybdenum disulfide (MoS 2 ) and a few members of transition metal dichalcogenides (TMDCs) in contact with ionic-liquid (IL) electrolyte have recently shown a great promise to overcome fundamental electronic and thermokinetic limitations for CO 2 reduction reaction, as well as the oxygen reduction and evolution reactions (ORR/OER). [7][8][9][10] These studies have been conducted on a limited number of TMDCs, and the majority of other TMDCs with a wide range of electronic and potentially catalytic properties have not been investigated. In this study, we report synthesis and characterization of a wide range of TMDCs including sulfides, selenides, and tellurides of group V and VI transition metals and study their electrochemical performance in aprotic medium with Li salts. We employ a wide suite of characterization techniques, such as scanning transmission electron microscopy (STEM), energy dispersive spectroscopy (EDS), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), dynamic light scattering (DLS), and atomic forceThe optimization of traditional electrocatalysts has reached a point where progress is impeded by fundamental physical factors including inherent scaling relations among thermokinetic characteristics of different elementary reaction steps, non-Nernstian behavior, and electronic structure of the catalyst. This indicates that the currently utilized classes of electrocatalysts may not be adequate for future needs. This study reports on synthesis and characterization of a new class of materials based on 2D transition metal dichalcogenides including sulfides, selenides, and tellurides of group V and VI transition metals that exhibit excellent catalytic performance for both oxygen reduction and evolution reactions in an aprotic medium with Li salts. The reaction rates are much higher for these materials than previously reported catalysts for these reactions. The reasons for the high activity are found to be the metal edges with adiabatic electron transfer capability and a cocatalyst effect involving an ionic-liquid electrolyte. These new materials are expected to have high activity for other core electrocatalytic reactions and open the way for advances in energy storage and catalysis. ElectrocatalystsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Hydrogenation-controlled phase transition on two-dimensional transition metal dichalcogenides and their unique physical and catalytic properties

Cited by 71 publications

References 68 publications

Nitrogen-doping induces tunable magnetism in ReS2

Nitrogen-doping induces tunable magnetism in ReS2

Strategies on Phase Control in Transition Metal Dichalcogenides

New Class of Electrocatalysts Based on 2D Transition Metal Dichalcogenides in Ionic Liquid

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