3R TaS<sub>2</sub> Surpasses the Corresponding 1T and 2H Phases for the Hydrogen Evolution Reaction

Yu, Feng; Gong, Shi-Jing; Du, Erwei; Chen, Xiaofan; Qi, Ruijuan; Yu, Ke; Zhu, Z. Q.

doi:10.1021/acs.jpcc.7b10833

Cited by 40 publications

(32 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To enrich our understanding of the 2D TMDs, other related materials should also be investigated. For example, TaS 2 , [ 146,233 ] NbS 2 , [ 136,234 ] and VS 2 , [ 235,236 ] all show their potential for electrochemical hydrogen generation. Therefore, searching for new types of TMDs‐based materials with favorable characteristics such as cost effectiveness, high efficiency, good durability, and pH‐independence, is essential for the future industrial water splitting application.…”

Section: Discussionmentioning

confidence: 99%

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

et al. 2020

View full text Add to dashboard Cite

Hydrogen has been deemed as an ideal substitute fuel to fossil energy because of its renewability and the highest energy density among all chemical fuels. One of the most economical, ecofriendly, and high‐performance ways of hydrogen production is electrochemical water splitting. Recently, 2D transition metal dichalcogenides (also known as 2D TMDs) showed their utilization potentiality as cost‐effective hydrogen evolution reaction (HER) catalysts in water electrolysis. Herein, recent representative research efforts and systematic progress made in 2D TMDs are reviewed, and future opportunities and challenges are discussed. Furthermore, general methods of synthesizing 2D TMDs materials are introduced in detail and the advantages and disadvantages for some specific methods are provided. This explanation includes several important regulation strategies of creating more active sites, heteroatoms doping, phase engineering, construction of heterostructures, and synergistic modulation which are capable of optimizing the electrical conductivity, exposure to the catalytic active sites, and reaction energy barrier of the electrode material to boost the HER kinetics. In the last section, the current obstacles and future chances for the development of 2D TMDs electrocatalysts are proposed to provide insight into and valuable guidelines for fabricating effective HER electrocatalysts.

show abstract

Section: Discussionmentioning

confidence: 99%

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The Ta 5+ peaks disappeared in Figure c, implying no detectable oxidation inside the foil. The Ta 4+ peaks should be assigned to TaS 2 . Small peaks of Ta 3+ , were also detected, locating at 24.3 and 22.3 eV, which could be assigned to TaN bonding .…”

mentioning

confidence: 91%

“…To obtain the valence change information, we performed X‐ray photoelectron spectroscopy (XPS) measurements with a small step length of 0.05 eV on the TaS 2 powder and hybrid foil. As shown in Figure b, the Ta 4+ peaks should be assigned to TaS 2 . Because the surface of the TaS 2 powder is easily oxidized, strong peaks of Ta 5+ assigned to Ta 2 O 5 were observed in Figure b.…”

mentioning

confidence: 93%

See 1 more Smart Citation

Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties

Zong

Yoo

Zhang

et al. 2019

Small

View full text Add to dashboard Cite

2D transitional metal dichalcogenide (2D-TMDC) materials, as inorganic graphene analogs (IGAs), have been intensively investigated for their novel chemical and physical properties when the thickness is reduced to a few atomic layers, such as MoS 2 , WS 2 , among others. [1] Tantalum disulfide, TaS 2 , one of the TMDC materials, has attracted growing attention recently. In the bulk state, TaS 2 occupies 2H or 1T structure, which is composed of covalently bonded STaS layers. 1T-TaS 2 with Ta in octahedral coordination with S atoms exhibits semiconducting behavior, and it has a commensurate charge density wave (CCDW) phase under 180 K. Adjusted by pressure, the superconductivity of 1T-TaS 2 develops in the CCDW state and survives to very high pressure. [2][3][4] 2H-TaS 2 with Ta in trigonal prismatic coordination with S atoms exhibits metallic behaviors with CDW phase transition (T CDW = 75 K) and superconductivity (T c = 0.8 K). [5][6][7][8] The electrical conductivity of single-crystal 2H-TaS 2 can reach 6.8 × 10 4 S m −1 at room temperature. [9] When the thickness is reduced to a few layers, interesting phenomena have been found, such as gate-tunable phase transition [10] and enhanced superconductivity, [11] which are promising properties for applications like electrical oscillators, [12] fast memories, [13] hydrogen evolution catalyst. [14] Until now, 2D TaS 2 has been mainly synthesized by the mechanical exfoliation method, [15] which is time consuming and of poor reproductivity and low yield. It has been noticed that the exfoliation of TaS 2 seems rather difficult and the atomically thin layers are unstable in ambient environments due to easy oxidation. [16] Complex encapsulation techniques are therefore required to help preserve the samples in air. [16] The chemical vapor deposition method [17] proves to be swift and effective in fabrication of high-quality 2D materials, but large-area synthesis of full-coverage atomically thin material is still in progress. For device applications, solution-based chemical synthesis is particularly important, as the product can be easily integrated into electronic devices.There is a new solution-based strategy to synthesize 2D materials in the form of inorganic/organic superlattice, in which the inorganic layers may get close to the low-dimensional state due to the spatial separation by the organic molecules. In our previous papers, we synthesized a hybrid superlattice with alternating 2D [TiS 2 ] monolayers and organic cations through an electrochemical reaction process. [18] The isolation of the [TiS 2 ] TaS 2 nanolayers with reduced dimensionality show interesting physics, such as a gate-tunable phase transition and enhanced superconductivity, among others. Here, a solution-based strategy to fabricate a large-area foil of hybrid TaS 2 /organic superlattice, where [TaS 2 ] monolayers and organic molecules alternatively stack in atomic scale, is proposed. The [TaS 2 ] layers are spatially isolated with remarkably weakened interlayer bonding, resulting in lattice vibration ...

show abstract

“…In particular, the figure suggests that the decoration/doping of metal/hetroatom over the base materials will enhance the catalytic reaction for specific gases and form the charge accumulation depletion region to improve the sensing performances. Reproduced from multiple sources with permission from References [18,41,42,46,[80][81][82][83][84][85][86][87][88][89][90][91]. Copyright 2016 Elsevier [18], copyright 2019 Elsevier [41], copyright 2016 Elsevier [42], copyright 2020 ACS [46], copyright 2020 [80], copyright 2019 Elsevier [92], copyright 2006 ACS [82], copyright 2007 ACS [83], copyright 2013 Elsevier [84], copyright 2014 Elsevier [85], copyright 2016 Elsevier [86], copyright 2018 ACS [87], copyright 2015 Elsevier [88], copyright 2014 Elsevier [89], copyright 2013 Nature [90], and copyright 2012 ACS [91].…”

Section: Figurementioning

confidence: 99%

Chemical Gas Sensors: Recent Developments, Challenges, and the Potential of Machine Learning—A Review

Yaqoob

Younis

2021

Sensors

132

View full text Add to dashboard Cite

Nowadays, there is increasing interest in fast, accurate, and highly sensitive smart gas sensors with excellent selectivity boosted by the high demand for environmental safety and healthcare applications. Significant research has been conducted to develop sensors based on novel highly sensitive and selective materials. Computational and experimental studies have been explored in order to identify the key factors in providing the maximum active location for gas molecule adsorption including bandgap tuning through nanostructures, metal/metal oxide catalytic reactions, and nano junction formations. However, there are still great challenges, specifically in terms of selectivity, which raises the need for combining interdisciplinary fields to build smarter and high-performance gas/chemical sensing devices. This review discusses current major gas sensing performance-enhancing methods, their advantages, and limitations, especially in terms of selectivity and long-term stability. The discussion then establishes a case for the use of smart machine learning techniques, which offer effective data processing approaches, for the development of highly selective smart gas sensors. We highlight the effectiveness of static, dynamic, and frequency domain feature extraction techniques. Additionally, cross-validation methods are also covered; in particular, the manipulation of the k-fold cross-validation is discussed to accurately train a model according to the available datasets. We summarize different chemresistive and FET gas sensors and highlight their shortcomings, and then propose the potential of machine learning as a possible and feasible option. The review concludes that machine learning can be very promising in terms of building the future generation of smart, sensitive, and selective sensors.

show abstract

3R TaS₂ Surpasses the Corresponding 1T and 2H Phases for the Hydrogen Evolution Reaction

Cited by 40 publications

References 28 publications

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties

Chemical Gas Sensors: Recent Developments, Challenges, and the Potential of Machine Learning—A Review

Contact Info

Product

Resources

About

3R TaS2 Surpasses the Corresponding 1T and 2H Phases for the Hydrogen Evolution Reaction

Cited by 40 publications

References 28 publications

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

2D Transition Metal Dichalcogenides: Design, Modulation, and Challenges in Electrocatalysis

Flexible Foil of Hybrid TaS2/Organic Superlattice: Fabrication and Electrical Properties

Chemical Gas Sensors: Recent Developments, Challenges, and the Potential of Machine Learning—A Review

Contact Info

Product

Resources

About

3R TaS₂ Surpasses the Corresponding 1T and 2H Phases for the Hydrogen Evolution Reaction

Flexible Foil of Hybrid TaS₂/Organic Superlattice: Fabrication and Electrical Properties