Role of different nitrogen functionalities on the electrochemical performance of activated carbons

Cordero-Lanzac, Tomás; Rosas, Juana M.; García-Mateos, Francisco J.; Ternero-Hidalgo, Juan José; Palomo, José; Rodríguez‐Mirasol, J.; Cordero, Tomás

doi:10.1016/j.carbon.2017.09.092

Cited by 40 publications

(17 citation statements)

References 52 publications

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“…A third peak at around 402 eV is also observed in all the potentials. This peak can be associated with more oxidized nitrogen species [47,48]. These oxidized nitrogen species increase significantly in the SWCNT modified at 1.8 V, in agreement with what has been observed in other amine-containing molecules, electrochemically attached on different materials surfaces [49,50].…”

Section: 3xps Analysis Of P and N Species On Electrochemically Modsupporting

confidence: 87%

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Quintero-Jaime

Cazorla‐Amorós

Morallón

2020

Electrochimica Acta

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Single Wall Carbon Nanotubes (SWCNTs) have been successfully functionalized by electrochemical oxidation in presence of 4-aminophenyl phosphonic acid (4-APPA).Electrochemical modification has been performed by cyclic voltammetry using different upper potential limits, producing the incorporation of N and P functionalities on SWCNT through polymerization reactions, although some covalent attachment cannot be discarded. Electrochemical oxidation in presence of CNT produces polymerization of 4-APPA, what has been related to the interaction between monomer and the CNT surface.The voltammograms of the functionalized SWCNT show different well-defined redox processes that are maintained at high pH. Raman spectroscopy shows that the structure of the SWCNT is maintained even at high potentials suggesting that oxidation selectively occurs in the 4-APPA monomer favoring polymer chain growth. The degree of modification of SWCNT can be easily controlled by selecting the electrochemical conditions.

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Section: 3xps Analysis Of P and N Species On Electrochemically Modsupporting

confidence: 87%

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Quintero-Jaime

Cazorla‐Amorós

Morallón

2020

Electrochimica Acta

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“…Electronic synergy also concerns adsorbed molecules, therefore charge generated during the ORR process might be channeled efficiently. 24,33 Similar interactions occur in the case of other nonmetal pairs such as nitrogen doped with phosphorus 20,35 or boron. 36 In addition, with oxygen atoms being connected to highoxidation-state atoms, the deactivation of the active site has been shown to be prevented by Ternero-Hidalgo et al 35 In this work, we discuss the impact of oxygen-and nitrogencontaining groups on the surface of sucrose-derived mesoporous carbon replicas on the performance in the electrochemical nitrate reduction, and the oxidative dehydrogenation of ethylbenzene.…”

Section: ■ Introductionmentioning

confidence: 78%

Electrochemical Denitrification and Oxidative Dehydrogenation of Ethylbenzene over N-doped Mesoporous Carbon: Atomic Level Understanding of Catalytic Activity by ¹⁵N NMR Spectroscopy

et al. 2020

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Spherical mesoporous carbon (with a particle size in the range of 40–75 μm) was synthesized by nanoreplication of a hard silica template using sucrose as the carbon precursor. The mesoporous carbon with BET surface areas higher than 1200 m2/g was doped with N by a treatment in an aqueous solution of nitric acid and/or in a flow of gaseous ammonia. The highest N content (3.2 wt % of N in bulk) was obtained when both modification methods were combined. Complementary physicochemical characterization techniques, including scanning electron microscopy (SEM), low-temperature N2 adsorption, powder X-ray diffraction (XRD), and Raman spectroscopy revealed the morphology, structure, and textural properties of the synthesized N-loaded carbon materials. For the identification of the detailed chemical structure on the surface of the carbons, 1H, 13C, and 15N solid-state nuclear magnetic resonance (NMR) measurements were performed, and the data were supported by chemical shift calculations with accurate quantum chemistry methods and X-ray photoelectron spectroscopic (XPS) analyses. All NMR experiments were performed at natural isotope abundance. The verified experimental data clearly showed that after the introduction of the N-containing moieties by the combined methods of treatment, a high concentration of pyridinic N at the edge, and pyrrolic N being external to the edge, was achieved for the mesoporous carbon. The distributed N surface species promoted the catalytic activity in the oxidative dehydrogenation of ethylbenzene to styrene but did not significantly influence the efficiency of the carbon materials in the electrochemical reduction of nitrate ions.

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“…[ 28,32 ] Moreover, the third peak at around 401.2 ± 0.2 eV which is associated with positively charged nitrogen. [ 28,33 ] However, non‐significant changes in the XPS N1s spectra are observed in the composite samples, despite the presence of V 2 O 5 (Table 1). Then, as conclusion it can be indicated that the presence of V 2 O 5 does not modified the structure of the polymers and the formation of polyaniline‐type polymers are obtained.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)

et al. 2020

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Hybrid materials consisting of aniline (ANI) and/or 2-aminodiphenylamine (PD) in the presence of V 2 O 5 nanoparticles were synthesized by in-situ chemical oxidative polymerization in one-step. Physicochemical and electrochemical characterization confirmed that in the structure of the composites, intercalation between the polymer chains and the V 2 O 5 slabs occurs. Optical properties study shows that the optical band gap of poly(ANI-co-PD)/V 2 O 5 is lower than poly-PD/ V 2 O 5. Thermal stability of the composites by thermogravimetric analysis was evaluated. Composites showed electrochemical activity with improved electrontransfer of the redox species in the polymer observed by cyclic voltammetry. These results highlight the great influence of the V 2 O 5 sheets and the polymer composition on the hybrid materials formation and properties.

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Role of different nitrogen functionalities on the electrochemical performance of activated carbons

Cited by 40 publications

References 52 publications

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Electrochemical Denitrification and Oxidative Dehydrogenation of Ethylbenzene over N-doped Mesoporous Carbon: Atomic Level Understanding of Catalytic Activity by ¹⁵N NMR Spectroscopy

Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)

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Role of different nitrogen functionalities on the electrochemical performance of activated carbons

Cited by 40 publications

References 52 publications

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Electrochemical functionalization of single wall carbon nanotubes with phosphorus and nitrogen species

Electrochemical Denitrification and Oxidative Dehydrogenation of Ethylbenzene over N-doped Mesoporous Carbon: Atomic Level Understanding of Catalytic Activity by 15N NMR Spectroscopy

Synthesis and characterization of polymer/V2O5 composites based on poly(2‐aminodiphenylamine)

Contact Info

Product

Resources

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Electrochemical Denitrification and Oxidative Dehydrogenation of Ethylbenzene over N-doped Mesoporous Carbon: Atomic Level Understanding of Catalytic Activity by ¹⁵N NMR Spectroscopy

Synthesis and characterization of polymer/V₂O₅ composites based on poly(2‐aminodiphenylamine)