Electrochemical hydrogen storage of carbon nanotubes and carbon nanofibers

Chen, X.; Zhang, Y.; Gao, Xueping; Pan, G. L.; Jiang, Xinyu; Qu, J.Q.; Wu, Feng; Yan, Jie; Song, Dawei

doi:10.1016/j.ijhydene.2003.08.010

Cited by 87 publications

(30 citation statements)

References 22 publications

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“…2F). Pristine MoS 2 layer spacing is measured to be 6.45 Å, consistent with the previous study (49). The spacing of 1.8-and 1.5-V lithiationtreated MoS 2 is increased very little to 6.50 and 6.54 Å but still within the range of the error bar, indicating also very little expansion of van der Waals gap.…”

Section: Significancesupporting

confidence: 90%

Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction

Wang¹,

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

918

845

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The ability to intercalate guest species into the van der Waals gap of 2D layered materials affords the opportunity to engineer the electronic structures for a variety of applications. Here we demonstrate the continuous tuning of layer vertically aligned MoS 2 nanofilms through electrochemical intercalation of Li + ions. By scanning the Li intercalation potential from high to low, we have gained control of multiple important material properties in a continuous manner, including tuning the oxidation state of Mo, the transition of semiconducting 2H to metallic 1T phase, and expanding the van der Waals gap until exfoliation. Using such nanofilms after different degree of Li intercalation, we show the significant improvement of the hydrogen evolution reaction activity. A strong correlation between such tunable material properties and hydrogen evolution reaction activity is established. This work provides an intriguing and effective approach on tuning electronic structures for optimizing the catalytic activity.2D materials | layer vertically standing | electrochemical catalysis L ayer-structured 2D materials are an interesting family of materials with strong covalent bonding within molecular layers and weak van der Waals interaction between layers. Beyond intensively studied graphene-related materials (1-4), there has been recent strong interest in other layered materials whose vertical thickness can be thinned down to less than few nanometers and horizontal width can also be reduced to nanoscale (5-9). The strong interest is driven by their interesting physical and chemical properties (2, 10) and their potential applications in transistors, batteries, topological insulators, thermoelectrics, artificial photosynthesis, and catalysis (4,(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25).One of the unique properties of 2D layered materials is their ability to intercalate guest species into their van der Waals gaps, opening up the opportunities to tune the properties of materials. For example, the spacing between the 2D layers could be increased by intercalation such as lithium (Li) intercalated graphite or molybdenum disulfide (MoS 2 ) and copper intercalated bismuth selenide (26-29). The electronic structures of the host lattice, such as the charge density, anisotropic transport, oxidation state, and phase transition, may also be changed by different species intercalation (26,27).As one of the most interesting layered materials, MoS 2 has been extensively studied in a variety of areas such as electrocatalysis (20)(21)(22)(30)(31)(32)(33)(34)(35)(36). It is known that there is a strong correlation between the electronic structure and catalytic activity of the catalysts (20,(37)(38)(39)(40)(41). It is intriguing to continuously tune the morphology and electronic structure of MoS 2 and explore the effects on MoS 2 hydrogen evolution reaction (HER) activity. Very recent studies demonstrated that the monolayered MoS 2 and WS 2 nanosheets with 1T metallic phase synthesized by chemical exfoliation exhibited superio...

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Section: Significancesupporting

confidence: 90%

Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction

Wang¹,

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

918

845

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“…It forms sandwich interlayer structure created by S-Mo-S layers, which are loosely bound to each other only by van der Waals forces (Rapoport et al 2005). Such structures, at the bulk and nanoscale, exhibit a broad array of applications, such as electrochemical hydrogen storage (Chen et al 2001), cathode material for rechargeable lithium batteries and solar cells (Imanishi et al 1992;Thomalla and Tributsch 2006), electric transport (Kopnov et al 2006), useful solid lubricant (Rapoport et al 2003), an intercalation host (Aharon et al 2006), and field emission tips (Nemanic et al 2003). For example, molybdenum disulfide may be an alternative material for next-generation nanoelectronic devices viz., transistor (Radisavljevic et al 2011) and tandem photovoltaic configurations because its electronic properties are superior to silicon (Li et al 2005) and its band gap transforms from indirect to direct at nanoscale.…”

Section: Introductionmentioning

confidence: 99%

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

et al. 2014

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The incessant use of antibiotics against infectious diseases has translated into a vicious circle of developing new antibiotic drug and its resistant strains in short period of time due to inherent nature of microorganisms to alter their genes. Many researchers have been trying to formulate inorganic nanoparticles-based antiseptics that may be linked to broad-spectrum activity and far lower propensity to induce microbial resistance than antibiotics. The way-out approaches in this direction are nanomaterials based (1) bactericidal and (2) bacteriostatic activities. We, herein, present hitherto unreported observations on microbial abatement using non-cytotoxic molybdenum disulfide nanostructures (MSNs) which are synthesized using microwave assisted solvothermal route. Inhibition of biofilm formation using MSNs is a unique feature of our study. Furthermore, this study evinces antimicrobial mechanism of MSNs by reactive oxygen species (ROS) dependent generation of superoxide anion radical via disruption of cellular functions.

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“…However, TNAs have lower areal specific capacity (Anwar et al 2015) which can be improved by adopting different strategies such as, metal or non-metal element doping (Liu et al 2008(Liu et al , 2014, annealing in different atmosphere (Lu et al 2012), conductive coating , and by compositing with the higher capacity materials . Molybdenum disulfide (MoS 2 ) is an attractive material for the practical applications including hydrogen storage, (Chen et al 2001;Ye et al 2006) as catalysts, (Hinnemann et al 2005;Lukowski et al 2013) lubricants, (Chhowalla and Amaratunga 2000;Savan et al 2000) double-layer capacitor (Cao et al 2013;Soon and Loh 2007) as well as lithiun-ion batteries (Hwang et al 2011;Stephenson et al 2014;Feng et al 2009;Li et al 2009;Dominko et al 2002). As an anode for lithium insertion/deinsertion, the volume of MoS 2 has no significant expansion due to its unique layered structure and weak inter-layer interaction .…”

Section: Introductionmentioning

confidence: 99%

Molybdenum disulfide grafted titania nanotube arrays as high capacity retention anode material for lithium ion batteries

et al. 2016

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Titania nanotube arrays (TNAs) were grown by anodic oxidation method, and molybdenum disulfide (MoS 2 ) grafted TNAs have been synthesized via one-step hydrothermal process. The MoS 2 grafted TNAs (MoS 2 / TNAs) when employed as an anode material in lithium ion battery, exhibited excellent areal specific capacity (*430 lAh cm -2 ) at current density of 50 lA cm -2 , which is 33% higher as compared to the pure anatase TNAs and 55% higher as compared to MoS 2 . Moreover, the capacity loss per cycle of MoS 2 /TNAs (*0.21%) was significantly lower than anatase TNAs (*1.47%), suggesting an increase of capacity retention.

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Electrochemical hydrogen storage of carbon nanotubes and carbon nanofibers

Cited by 87 publications

References 22 publications

Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction

Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

Molybdenum disulfide grafted titania nanotube arrays as high capacity retention anode material for lithium ion batteries

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Electrochemical hydrogen storage of carbon nanotubes and carbon nanofibers

Cited by 87 publications

References 22 publications

Electrochemical tuning of vertically aligned MoS 2 nanofilms and its application in improving hydrogen evolution reaction

Electrochemical tuning of vertically aligned MoS 2 nanofilms and its application in improving hydrogen evolution reaction

Innovative biofilm inhibition and anti-microbial behavior of molybdenum sulfide nanostructures generated by microwave-assisted solvothermal route

Molybdenum disulfide grafted titania nanotube arrays as high capacity retention anode material for lithium ion batteries

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Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction

Electrochemical tuning of vertically aligned MoS ₂ nanofilms and its application in improving hydrogen evolution reaction