Sulfur-Depleted Monolayered Molybdenum Disulfide Nanocrystals for Superelectrochemical Hydrogen Evolution Reaction

Lin, Liangxu; Miao, Naihua; Wen, Yan; Zhang, Shaowei; Ghosez, Philippe; Sun, Zhimei; Allwood, D. A.

doi:10.1021/acsnano.6b04904

Cited by 144 publications

(182 citation statements)

References 37 publications

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“…In addition, the Ajayan group demonstrated that oxygen plasma treatment and H 2 annealing introduced additional active sites within the MoS 2 monolayer, significantly improving the HER activity [44]. Recently, more rational and controllable defect modulation has been reported through combined experimental and theoretical studies [45–47]. Allwood and co-workers prepared MoS 2 nanocrystals and activated the Mo atoms in the basal surface of MoS 2 nanocrystals by S depletion [45], with the resulting activated MoS 2 exhibiting an very high HER performance (~150 mV at −10 mA cm −2 and a Tafel slope of ~29 mV dec −1 ).…”

Section: Synthetic Strategies For Increasing Active Site Densitiesmentioning

confidence: 99%

“…Recently, more rational and controllable defect modulation has been reported through combined experimental and theoretical studies [45–47]. Allwood and co-workers prepared MoS 2 nanocrystals and activated the Mo atoms in the basal surface of MoS 2 nanocrystals by S depletion [45], with the resulting activated MoS 2 exhibiting an very high HER performance (~150 mV at −10 mA cm −2 and a Tafel slope of ~29 mV dec −1 ). Cao and co-workers also verified the importance of S vacancies on the catalytic activity for the HER [46], estimating the intrinsic TOFs of the edge sites, S vacancies, and grain boundaries as approximately 7.5, 3.2, and 0.1 s −1 , respectively.…”

Section: Synthetic Strategies For Increasing Active Site Densitiesmentioning

confidence: 99%

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Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction

Seo

2017

Nano Convergence

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Hydrogen has received significant attention as a promising future energy carrier due to its high energy density and environmentally friendly nature. In particular, the electrocatalytic generation of hydrogen fuel is highly desirable to replace current fossil fuel-dependent hydrogen production methods. However, to achieve widespread implementation of electrocatalytic hydrogen production technology, the development of highly active and durable electrocatalysts based on Earth-abundant elements is of prime importance. In this context, nanostructured molybdenum sulfides (MoSx) have received a great deal of attention as promising alternatives to precious metal-based catalysts. In this focus review, we summarize recent efforts towards identification of the active sites in MoSx-based electrocatalysts for the hydrogen evolution reaction (HER). We also discuss recent synthetic strategies for the engineering of catalyst structures to achieve high active site densities. Finally, we suggest ongoing and future research challenges in the design of advanced MoSx-based HER electrocatalysts.

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Section: Synthetic Strategies For Increasing Active Site Densitiesmentioning

confidence: 99%

Section: Synthetic Strategies For Increasing Active Site Densitiesmentioning

confidence: 99%

Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction

Seo

2017

Nano Convergence

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“…Therefore, the more precise the control over these characteristics, the better would the 0D TMDs' overall functionalities. So far, a range of approaches have been utilized for preparation of 0D TMDs and those synthetic routes can be classified as top‐down and bottom‐up approaches . Top‐down synthesis approaches are based on exfoliation of their bulk crystals or etching of larger 2D morphologies, whereas bottom‐up approaches are conducted through a range of synthesis routes with diverse kinds of transition metal and chalcogenide precursors.…”

Section: Synthesismentioning

confidence: 99%

“…Bulk TMDs crystals were intercalated with K atoms between those covalently bonded sheets. Subsequently, the reaction between K atoms and ethanol/H 2 O mixture produce H 2 gases, inducing successful separation of 0D TMDs (Figure b) . Otherwise, starting TMDs materials ultimately determine the eventual morphologies of TMDs nanostructures.…”

Section: Synthesismentioning

confidence: 99%

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Emerging 0D Transition‐Metal Dichalcogenides for Sensors, Biomedicine, and Clean Energy

Setyawati

Zou

et al. 2017

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Following research on two-dimensional (2D) transition metal dichalcogenides (TMDs), zero-dimensional (0D) TMDs nanostructures have also garnered some attention due to their unique properties; exploitable for new applications. The 0D TMDs nanostructures stand distinct from their larger 2D TMDs cousins in terms of their general structure and properties. 0D TMDs possess higher bandgaps, ultra-small sizes, high surface-to-volume ratios with more active edge sites per unit mass. So far, reported 0D TMDs can be mainly classified as quantum dots, nanodots, nanoparticles, and small nanoflakes. All exhibited diverse applications in various fields due to their unique and excellent properties. Of significance, through exploiting inherent characteristics of 0D TMDs materials, enhanced catalytic, biomedical, and photoluminescence applications can be realized through this exciting sub-class of TMDs. Herein, we comprehensively review the properties and synthesis methods of 0D TMDs nanostructures and focus on their potential applications in sensor, biomedicine, and energy fields. This article aims to educate potential adopters of these excitingly new nanomaterials as well as to inspire and promote the development of more impactful applications. Especially in this rapidly evolving field, this review may be a good resource of critical insights and in-depth comparisons between the 0D and 2D TMDs.

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The Hydrogen Electrode Reaction

2019

Fundamentals of Electrocatalyst Materials and Interfacial Characterization

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Sulfur-Depleted Monolayered Molybdenum Disulfide Nanocrystals for Superelectrochemical Hydrogen Evolution Reaction

Cited by 144 publications

References 37 publications

Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction

Recent advances in unveiling active sites in molybdenum sulfide-based electrocatalysts for the hydrogen evolution reaction

Emerging 0D Transition‐Metal Dichalcogenides for Sensors, Biomedicine, and Clean Energy

The Hydrogen Electrode Reaction

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