Nanoscale carbon materials from hydrocarbons pyrolysis: Structure, chemical behavior, utilisation for non-aqueous supercapacitors

Savilov, S. V.; Strokova, N. E.; Иванов, А. С.; Arkhipova, Ekaterina A.; Desyatov, A. V.; Xia, Hui; Алдошин, С. М.; Лунин, В. В.

doi:10.1016/j.materresbull.2015.01.001

Cited by 20 publications

(7 citation statements)

References 11 publications

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“…Although different commercial devices already exist, there are still many scientific and technological challenges in the supercapacitor research area, mainly with respect to increasing the amount of stored energy [2]. Given their suitable characteristics for supercapacitor electrode application, carbon materials have received the most attention and they are the most widely used in this application [3][4][5][6][7][8][9][10][11][12]. Within carbon materials, carbon fibres (CF) have special characteristics when compared with other carbon materials [13].…”

Section: Introductionmentioning

confidence: 99%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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An electrical double-layer capacitor (EDLC) is based on the physical adsorption/desorption of electrolyte ions onto the surface of electrodes. Due to its high surface area and other properties, such as electrochemical stability and high electrical conductivity, carbon materials are the most widely used materials for EDLC electrodes. In this work, we study an activated carbon felt obtained from sheep wool felt (ACF'f) as a supercapacitor electrode. The ACF'f was characterized by elemental analysis, scanning electron microscopy (SEM), textural analysis, and X-ray photoelectron spectroscopy (XPS). The electrochemical behaviour of the ACF'f was tested in a two-electrode Swagelok ®-type, using acidic and basic aqueous electrolytes. At low current densities, the maximum specific capacitance determined from the charge-discharge curves were 163 F•g −1 and 152 F•g −1 , in acidic and basic electrolytes, respectively. The capacitance retention at higher current densities was better in acidic electrolyte while, for both electrolytes, the voltammogram of the sample presents a typical capacitive behaviour, being in accordance with the electrochemical results.

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Section: Introductionmentioning

confidence: 99%

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Pina

Amaya

Marcuzzo

et al. 2018

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“…Graphene oxide (GO) and graphene nanoflakes (GNFs) are attributed to 2D carbon materials. GNFs can be considered as a flat polyhedra with 5–15 carbon layers and bent edges [ 63 ]. GO and CNFs are inactive in alcohol conversion ( Table 2 ), [ 11 , 14 ] though they contain a small amount of oxygen ( Table 2 ).…”

Section: Discussionmentioning

confidence: 99%

Conversion of Secondary C3-C4 Aliphatic Alcohols on Carbon Nanotubes Consolidated by Spark Plasma Sintering

et al. 2021

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We analyze how the changes in the dimension of carbon nanomaterial (CNM) affect their catalytic conversion of secondary aliphatic alcohols. Carbon nanotubes (CNTs) consolidated by spark plasma sintering (SPS) were inactive in the conversion of secondary C3-C4 aliphatic alcohols because of the «healing» of defects in carbon structure during SPS. Gas-phase treatment of consolidated CNTs with HNO3 vapors led to their surface oxidation without destruction of the bulk structure of pellets. The oxygen content in consolidated CNTs determined by X-ray photoelectron spectroscopy increased from 11.3 to 14.9 at. % with increasing the oxidation time from 3 to 6 h. Despite the decrease in the specific surface area, the oxidized samples showed enhanced catalytic activity in alcohol conversion because of the increased number of oxygen radicals with unpaired electrons, which was established by electron paramagnetic resonance spectroscopy. We conclude that the structure of CNM determines the content and/or ratio of sp2 and sp3-hybridized carbon atoms in the material. The experimental and literature data demonstrated that sp3-hybridized carbon atoms on the surface are probably the preferable site for catalytic conversion of alcohols.

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“…Carbon nanotubes, few-layer graphene nanoflakes and nitrogen-substituted counterparts were synthesized by pyrolitic decomposition of hexane (for pristine materials) or acetonitrile (for N-doped materials) on a mesoporous oxide catalyst (Table 2) using the techniques described in [24,[33][34][35].…”

Section: Methodsmentioning

confidence: 99%

“…The doping effect of CNTs and GNFs with nitrogen on the adsorption of organic pollutants was found to be significant both for adsorption from aqueous solutions [21][22][23] and for vapour adsorption [24]. This work is intended to summarize the accumulated material, study the problem across-the-board and improve understanding of vapour adsorption process on nitrogen-substituted CNMs by finding new regularities.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of organic solvent vapours on carbon nanotubes, few-layer graphene nanoflakes and their nitrogen-doped counterparts

et al. 2021

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This work studies the influence of nitrogen doping of carbon nanotubes (CNTs) and few-layer graphene nanoflakes (GNFs) on the adsorption of organic solvent vapours. The synthesized materials (CNTs, GNFs and N-doped counterparts) were thoroughly characterized by simultaneous thermal analysis, low temperature nitrogen physisorption and X-Ray photoelectron spectroscopy. The basic regularities of the adsorption of organic solvent vapours were studied using acetone, ethyl acetate, acetic acid and toluene. The dependence of the maximum adsorption capacity of CNTs, GNFs and N-doped counterparts on the dipole moment of adsorbate was investigated. The dependencies of the isosteric heat of adsorption on the degree of surface coverage for various pairs of adsorbate-adsorbent were obtained and the average values of the heat of adsorption were calculated. It was found that introduction of nitrogen into the structure of CNTs and GNFs significantly increases the heat of acetic acid vapour adsorption.

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Nanoscale carbon materials from hydrocarbons pyrolysis: Structure, chemical behavior, utilisation for non-aqueous supercapacitors

Cited by 20 publications

References 11 publications

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Supercapacitor Electrode Based on Activated Carbon Wool Felt

Conversion of Secondary C3-C4 Aliphatic Alcohols on Carbon Nanotubes Consolidated by Spark Plasma Sintering

Adsorption of organic solvent vapours on carbon nanotubes, few-layer graphene nanoflakes and their nitrogen-doped counterparts

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