TY - JOUR

T1 - One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon-carbon nanotube hybrids

AU - Lobiak, Egor V.

AU - Bulusheva, Lyubov G.

AU - Fedorovskaya, Ekaterina O.

AU - Shubin, Yury V.

AU - Plyusnin, Pavel E.

AU - Lonchambo, Pierre

AU - Senkovskiy, Boris V.

AU - Ismagilov, Zinfer R.

AU - Flahaut, Emmanuel

AU - Okotrub, Alexander V.

PY - 2017/12/12

Y1 - 2017/12/12

N2 - Novel nitrogen-doped carbon hybrid materials consisting of multiwalled nanotubes and porous graphitic layers have been produced by chemical vapor deposition over magnesium-oxide-supported metal catalysts. CNx nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carbon structures was due to the slow activation of catalysts for the nanotube growth in a carbon-containing gas environment. An analysis of the obtained products by means of transmission electron microscopy, thermogravimetry and X-ray photoelectron spectroscopy methods revealed that the catalyst's composition influences the nanotube/porous carbon ratio and concentration of incorporated nitrogen. The hybrid materials were tested as electrodes in a 1M H2SO4 electrolyte and the best performance was found for a nitrogen-enriched material produced using the Fe/Mo catalyst. From the electrochemical impedance spectroscopy data, it was concluded that the nitrogen doping reduces the resistance at the carbon surface/electrolyte interface and the nanotubes permeating the porous carbon provide fast charge transport in the cell.

AB - Novel nitrogen-doped carbon hybrid materials consisting of multiwalled nanotubes and porous graphitic layers have been produced by chemical vapor deposition over magnesium-oxide-supported metal catalysts. CNx nanotubes were grown on Co/Mo, Ni/Mo, or Fe/Mo alloy nanoparticles, and MgO grains served as a template for the porous carbon. The simultaneous formation of morphologically different carbon structures was due to the slow activation of catalysts for the nanotube growth in a carbon-containing gas environment. An analysis of the obtained products by means of transmission electron microscopy, thermogravimetry and X-ray photoelectron spectroscopy methods revealed that the catalyst's composition influences the nanotube/porous carbon ratio and concentration of incorporated nitrogen. The hybrid materials were tested as electrodes in a 1M H2SO4 electrolyte and the best performance was found for a nitrogen-enriched material produced using the Fe/Mo catalyst. From the electrochemical impedance spectroscopy data, it was concluded that the nitrogen doping reduces the resistance at the carbon surface/electrolyte interface and the nanotubes permeating the porous carbon provide fast charge transport in the cell.

KW - Bimetallic catalyst

KW - Eectrochemical impedance spectroscopy

KW - N-doped carbon

KW - Porous carbon-carbon nanotube hybrid

KW - Supercapacitor

KW - N-2 MOLECULES

KW - ION BATTERIES

KW - electrochemical impedance spectroscopy

KW - porous carbon-carbon nanotube hybrid

KW - OXIDE

KW - GRAPHENE

KW - NANOMATERIALS

KW - NANOPARTICLES

KW - TEMPERATURE

KW - LITHIUM-SULFUR BATTERIES

KW - RAY PHOTOELECTRON-SPECTROSCOPY

KW - ELECTROCHEMICAL CAPACITORS

KW - bimetallic catalyst

KW - supercapacitor

UR - http://www.scopus.com/inward/record.url?scp=85038030023&partnerID=8YFLogxK

U2 - 10.3762/bjnano.8.267

DO - 10.3762/bjnano.8.267

M3 - Article

C2 - 29354339

AN - SCOPUS:85038030023

VL - 8

SP - 2669

EP - 2679

JO - Beilstein Journal of Nanotechnology

JF - Beilstein Journal of Nanotechnology

SN - 2190-4286

IS - 1

ER -