Combustion/micropyretic synthesis of atomically thin two-dimensional materials for energy applications

Mukasyan, Alexander S.; Manukyan, Khachatur V.

doi:10.1016/j.coche.2014.08.005

Cited by 19 publications

(9 citation statements)

References 47 publications

(49 reference statements)

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“…Combustion synthesis (CS) or Self-Propagating High Temperature Synthesis (SHS) is a wellestablished non-traditional energy saving approach to produce a variety of materials, including metals and their alloys, ceramics and cermets, composites and functionally graded compounds, 2D-crystals, and nano-powders [1][2][3][4][5][6]. Although CS is attractive for many applications, there are still fundamental issues in solid physics that need to be resolved.…”

Section: Introductionmentioning

confidence: 99%

Solid-flame: Experimental validation

Shuck

Manukyan

Rouvimov

et al. 2016

Combustion and Flame

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The tantalum-carbon reactive system possesses a high energy of reaction with an adiabatic combustion temperature of 2743 K, which is significantly below the melting points of the reactants, as well as any intermediate phases and final products. It was suggested that a combustion wave could propagate in Ta+C mixtures solely owing to a solid-solid reaction. However, this combustion process has never been shown to occur without gas-assisted transport. Here, we report preparation of highly pure and pore-free Ta/C composite particles, which were used for experimental validation of the solid-flame. Preparation of these composite particles involves short term high-energy ball milling (HEBM) of tantalum and carbon powders. Highresolution microscopy coupled with three-dimensional reconstruction techniques were used to characterize the volume nanostructure of mechanically fabricated composite particles. It was quantitatively shown that the particles have nano-scale mixing of the reagents and possess high contact surface area between tantalum and carbon. Experiments revealed that the ignition temperature of as fabricated composite particles is 1243±15 K and maximum combustion temperature was shown to be 2487±50 K, which is well below any possible solid-liquid transitions. Utilizing results obtained with composite particles prepared under different HEBM conditions, it is shown that carbon diffusion through the tantalum grain boundaries and subsequent formation of a Ta(C) solid solution defines low temperature ignition of mechanically fabricated particles. The high surface area contact between the Ta and C nano-scale reagents allows the reaction to propagate in a self-sustained manner, owing solely to a solid-state diffusion mechanism.

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Section: Introductionmentioning

confidence: 99%

Solid-flame: Experimental validation

Shuck

Manukyan

Rouvimov

et al. 2016

Combustion and Flame

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“…The pyrolysis conversion process is essentially a self-sustained thermal process combined with wet chemistry in solution in this work, which can be considered as a modified type of combustion synthesis (CS) process. − During the past decade, significant progress has been achieved in synthesis of carbon nanomaterials using low cost CS methods . Graphene with low oxygen content was synthesized by a reaction between a refractory ceramic compound silicon carbide (SiC) and polymer PTFE .…”

Section: Introductionmentioning

confidence: 99%

“…15−17 During the past decade, significant progress has been achieved in synthesis of carbon nanomaterials using low cost CS methods. 18 Graphene with low oxygen content was synthesized by a reaction between a refractory ceramic compound silicon carbide (SiC) and polymer PTFE. 19 Layered graphite materials were prepared through burning metals (e.g., Li, Mg, K and Zn) in CO 2 condition for electrochemical applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Scalable Conversion of CO₂ to N-Doped Carbon Foam for Efficient Oxygen Reduction Reaction and Lithium Storage

Song²,

Du³

et al. 2018

ACS Sustainable Chem. Eng.

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With regard to CO2 usage for the sustainable production of value-added chemicals, this work provides a fast pyrolysis process for the first time that can be scaled up in directly capturing CO2 to produce N-doped carbon foam (NCF) as a functional nanomaterial. Flammable alkaline solutions of hydrazine hydrate serves as CO2 adsorbent, fuel as well as nitrogen source for the NCFs, and magnesium powders are involved into the reaction to provide complex metal ion and also energy for the self-propagating high-temperature combustion pyrolysis. The prepared NCFs exhibit efficient electrochemistry performance toward lithium-ion battery and oxygen reduction reaction benefiting from the well-formed foam structure with hierarchical pores, in situ nitrogen doping and high specific surface area. More importantly, this approach introduce a general solution system that can further integrate various additives dissolved homogeneously, thus greatly increasing process controllability and product selectivity for the thermochemical conversion of CO2.

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“…These three articles mainly discuss pathways in condensed matter and related bifurcations [13][14][15] both from a macroscopic and microscopic view point. Nanoscale energetic behavior of small structures that result from non-equilibrium processes like rapid solid-state combustion and surface deposition are discussed in the energy-materials context in two other articles in this issue [16,17]. The new complexities and energy sharing observed during the very early stage of a phase transformation (bifurcation) is also discussed in another article [18].…”

mentioning

confidence: 96%

Editorial overview: Materials engineering: The shape of materials engineering for the next 100 years

Sekhar

2015

Current Opinion in Chemical Engineering

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Combustion/micropyretic synthesis of atomically thin two-dimensional materials for energy applications

Cited by 19 publications

References 47 publications

Solid-flame: Experimental validation

Solid-flame: Experimental validation

Scalable Conversion of CO₂ to N-Doped Carbon Foam for Efficient Oxygen Reduction Reaction and Lithium Storage

Editorial overview: Materials engineering: The shape of materials engineering for the next 100 years

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Combustion/micropyretic synthesis of atomically thin two-dimensional materials for energy applications

Cited by 19 publications

References 47 publications

Solid-flame: Experimental validation

Solid-flame: Experimental validation

Scalable Conversion of CO2 to N-Doped Carbon Foam for Efficient Oxygen Reduction Reaction and Lithium Storage

Editorial overview: Materials engineering: The shape of materials engineering for the next 100 years

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Product

Resources

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Scalable Conversion of CO₂ to N-Doped Carbon Foam for Efficient Oxygen Reduction Reaction and Lithium Storage