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

Beilstein Journal of Nanotechnology

Zinfer R. Ismagilov¹  Pierre Lonchambon²  Emmanuel Flahaut²  Egor V. Lobiak³  Ekaterina O. Fedorovskaya³  Alexander V. Okotrub³  Lyubov G. Bulusheva³  Pavel E. Plyusnin³  Yury V. Shubin³  Boris V. Senkovskiy⁴ 

[1] Boreskov Institute of Catalysis, SB RAS, 630090 Novosibirsk, Russia,;CNRS, Institut Carnot Cirimat, F-31062 Toulouse, France;Nikolaev Institute of Inorganic Chemistry, SB RAS, 630090 Novosibirsk, Russia;St. Petersburg State University, 7-9, Universitetskaya Nab., St. Petersburg 199034, Russia,;

关键词: bimetallic catalyst;    electrochemical impedance spectroscopy;    N-doped carbon;    porous carbon–carbon nanotube hybrid;    supercapacitor;   

DOI  :  10.3762/bjnano.8.267

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown