Influence of monomer content on course of aniline polymerization in presence of high surface area carbon

Kuznetsov, A. N.; Ayupov, Artem B.; Lebedeva, Marina V.

doi:10.1016/j.jelechem.2018.12.057

Cited by 10 publications

(9 citation statements)

References 60 publications

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“…Thus, the shape of the voltammograms is governed by polymer content and becomes similar to the polyaniline for the samples with higher polyaniline content. This behavior has been previously observed for carbon/polyaniline composites [ 35 ].…”

Section: Resultssupporting

confidence: 83%

“…While G/Si-PANI-30s and G/Si-PANI-5min clearly show the typical redox processes, G/Si-PANI-10s exhibits an important broadening of both peaks. This confirms the presence of small oligomers because of the short period of time employed during the polymerization, which does not enable the formation of large chains of polyaniline [ 35 ].…”

Section: Resultsmentioning

confidence: 64%

“…The further growth of the aniline loading results in a shift of this reversible peak to higher potentials. This peak at 0.6 V observed for the lowest polyaniline loading can be associated to the response of a major product of aniline dimerization in acid media [ 34 , 35 , 36 ]. Thus, the shape of the voltammograms is governed by polymer content and becomes similar to the polyaniline for the samples with higher polyaniline content.…”

Section: Resultsmentioning

confidence: 99%

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Polyaniline-Derived N-Doped Ordered Mesoporous Carbon Thin Films: Efficient Catalysts towards Oxygen Reduction Reaction

2020

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One of the most challenging targets in oxygen reduction reaction (ORR) electrocatalysts based on N-doped carbon materials is the control of the pore structure and obtaining nanostructured thin films that can easily be incorporated on the current collector. The carbonization of nitrogen-containing polymers and the heat treatment of a mixture of carbon materials and nitrogen precursor are the most common methods for obtaining N-doped carbon materials. However, in this synthetic protocols, the surface area and pore distribution are not controlled. This work enables the preparation of 2D-ordered N-doped carbon materials through the carbonization of 2D polyaniline. For that purpose, aniline has been electropolymerized within the porous structure of two different templates (ordered mesoporous Silica and ordered mesoporous Titania thin films). Thus, aniline has been impregnated into the porous structure and subsequently electropolymerized by means of chronoamperometry at constant potential. The resultant samples were heat-treated at 900 °C with the aim of obtaining 2D N-doped carbon materials within the template structures. Polyaniline and polyaniline-derived carbon materials have been analyzed via XPS and TEM and characterized by electrochemical measurements. It is worth noting that the obtained 2D-ordered mesoporous N-doped carbon materials have proved to be highly active electrocatalysts for the ORR because of the formation of quaternary nitrogen species during the heat treatment.

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Section: Resultssupporting

confidence: 83%

Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

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Polyaniline-Derived N-Doped Ordered Mesoporous Carbon Thin Films: Efficient Catalysts towards Oxygen Reduction Reaction

2020

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“…Interestingly, Kuznetsov et al 73 recently revealed that a low monomer concentration results in the predominant development of low-weight intermediates at the early stages of aniline polymerization as final products. In this way, reversible peaks located at 0.60–0.70 V usually appear with a lower aniline content and high potential, in agreement with the electrochemical behaviour observed in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…70,71 Nonetheless, relatively lower monomer concentrations could lead to a decrease of the monomer/radical-cation ratio and to the development of one or This journal is © The Royal Society of Chemistry 2022 two wide 'middle peaks', mainly assigned to dimers, degradation products related to oxidized PANI (benzoquinone/hydroquinone) 70 or crosslinked units. 72 Interestingly, Kuznetsov et al 73 recently revealed that a low monomer concentration results in the predominant development of low-weight intermediates at the early stages of aniline polymerization as nal products. In this way, reversible peaks located at 0.60-0.70 V usually appear with a lower aniline content and high potential, in agreement with the electrochemical behaviour observed in Fig.…”

Section: Electrochemical Functionalization Of Cnts In the Presence Of...mentioning

confidence: 99%

On the mechanism of electrochemical functionalization of carbon nanotubes with different structures with aminophenylphosphonic acid isomers: an experimental and computational approach

et al. 2022

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Molecular engineering toward sustainable development of multiple-doped hierarchical porous carbons for superior zinc ion storage

Liu

Feng

et al. 2022

Sci. China Mater.

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Aqueous Zn-ion hybrid supercapacitors (ZHSCs) hold great potential as next-generation energy storage devices due to their low cost, excellent rate capability, long cycling life, and high safety. Heteroatom-doped hierarchical porous carbons (HD-HPCs) with integrated high specific surface area, multiscale pores, and abundant defects have been regarded as promising cathode materials for ZHSCs. However, the in situ architecture of HD-HPCs with these multiple advantages via a sustainable and controllable method remains an arduous challenge. Herein, a novel molecular engineering strategy was proposed for the in situ construction of N/P/O-doped HD-HPCs via the direct carbonization of multiple-heteroatom-rich hypermolecules. Such a strategy has multiple advantages, including the exclusion of pore-making techniques, activation agents, templates, and complicated and hazard washing processes, demonstrating its green and sustainable properties. The highly active multiple-heteroatom-rich hypermolecular precursors contributed to the formation of abundant micro/mesopores due to the self-abscission of heteroatoms and heteroatom-contiguous carbon atoms at high carbonization temperatures. Consequently, these active structural/compositional features endowed the optimal cathodes with outstanding storage capacities of 139.2 and 88.9 mA h g −1 at 0.5 and 20 A g −1 for aqueous ZHSCs, respectively. They also delivered a superior storage performance in quasi-solid ZHSCs (QS-ZHSCs) with a high specific capacity of 111.5 mA h g −1 at 0.5 A g −1 . Superior energy/power densities and long cycling stability were also achieved for aqueous and QS-ZHSCs. The theoretical calculation confirmed the synergetic effects of multiple-atom doping on enhancing the electronic conductivity and reducing the energy barrier between Zn ions and carbon, which promote the Zn-ion adsorption capability. These findings shed fresh light on the straightforward manufacture of superior HD-HPCs for electrochemical energy storage.

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Influence of monomer content on course of aniline polymerization in presence of high surface area carbon

Cited by 10 publications

References 60 publications

Polyaniline-Derived N-Doped Ordered Mesoporous Carbon Thin Films: Efficient Catalysts towards Oxygen Reduction Reaction

Polyaniline-Derived N-Doped Ordered Mesoporous Carbon Thin Films: Efficient Catalysts towards Oxygen Reduction Reaction

On the mechanism of electrochemical functionalization of carbon nanotubes with different structures with aminophenylphosphonic acid isomers: an experimental and computational approach

Molecular engineering toward sustainable development of multiple-doped hierarchical porous carbons for superior zinc ion storage

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