Research output: Contribution to journal › Article › peer-review
Comparative Study of the Structural Features and Electrochemical Properties of Nitrogen-Containing Multi-Walled Carbon Nanotubes after Ion-Beam Irradiation and Hydrochloric Acid Treatment. / Korusenko, Petr M.; Nesov, Sergey N.; Iurchenkova, Anna A.; Fedorovskaya, Ekaterina O.; Bolotov, Valery V.; Povoroznyuk, Sergey N.; Smirnov, Dmitry A.; Vinogradov, Alexander S.
In: Nanomaterials, Vol. 11, No. 9, 2163, 09.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Comparative Study of the Structural Features and Electrochemical Properties of Nitrogen-Containing Multi-Walled Carbon Nanotubes after Ion-Beam Irradiation and Hydrochloric Acid Treatment
AU - Korusenko, Petr M.
AU - Nesov, Sergey N.
AU - Iurchenkova, Anna A.
AU - Fedorovskaya, Ekaterina O.
AU - Bolotov, Valery V.
AU - Povoroznyuk, Sergey N.
AU - Smirnov, Dmitry A.
AU - Vinogradov, Alexander S.
N1 - Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/9
Y1 - 2021/9
N2 - Using a set of microscopic, spectroscopic, and electrochemical methods, a detailed study of the interrelation between the structural and electrochemical properties of the as-prepared nitrogen-containing multi-walled carbon nanotubes (N-MWCNTs) and their modified derivatives is carried out. It was found that after treatment of nanotubes with hydrochloric acid, their structure is improved by removing amorphous carbon from the outer layers of N-MWCNTs. On the contrary, ion bombardment leads to the formation of vacancy-type structural defects both on the surface and in the bulk of N-MWCNTs. It is shown that the treated nanotubes have an increased specific capacitance (up to 27 F·g−1) compared to the as-prepared nanotubes (13 F·g−1). This is due to an increase in the redox capacitance. It is associated with the reversible Faraday reactions with the participation of electrochemically active pyridinic and pyrrolic nitrogen inclusions and oxygen-containing functional groups (OCFG). Based on the comparison between cyclic voltammograms of N-MWCNTs treated in HCl and with an ion beam, the peaks on these curves were separated and assigned to specific nitrogen inclusions and OCFGs. It is shown that the rate of redox reactions with the participation of OCFGs is significantly higher than that of reactions with nitrogen inclusions in the pyridinic and pyrrolic forms. Moreover, it was established that treatment of N-MWCNTs in HCl is accompanied by a significant increase in the activity of nitrogen centers, which, in turn, leads to an increase in the rate of redox reactions involving OCFGs. Due to the significant contribution of redox capacitance, the obtained results can be used to develop supercapacitors with increased total specific capacitance.
AB - Using a set of microscopic, spectroscopic, and electrochemical methods, a detailed study of the interrelation between the structural and electrochemical properties of the as-prepared nitrogen-containing multi-walled carbon nanotubes (N-MWCNTs) and their modified derivatives is carried out. It was found that after treatment of nanotubes with hydrochloric acid, their structure is improved by removing amorphous carbon from the outer layers of N-MWCNTs. On the contrary, ion bombardment leads to the formation of vacancy-type structural defects both on the surface and in the bulk of N-MWCNTs. It is shown that the treated nanotubes have an increased specific capacitance (up to 27 F·g−1) compared to the as-prepared nanotubes (13 F·g−1). This is due to an increase in the redox capacitance. It is associated with the reversible Faraday reactions with the participation of electrochemically active pyridinic and pyrrolic nitrogen inclusions and oxygen-containing functional groups (OCFG). Based on the comparison between cyclic voltammograms of N-MWCNTs treated in HCl and with an ion beam, the peaks on these curves were separated and assigned to specific nitrogen inclusions and OCFGs. It is shown that the rate of redox reactions with the participation of OCFGs is significantly higher than that of reactions with nitrogen inclusions in the pyridinic and pyrrolic forms. Moreover, it was established that treatment of N-MWCNTs in HCl is accompanied by a significant increase in the activity of nitrogen centers, which, in turn, leads to an increase in the rate of redox reactions involving OCFGs. Due to the significant contribution of redox capacitance, the obtained results can be used to develop supercapacitors with increased total specific capacitance.
KW - nitrogen-containing multi-walled carbon nanotubes
KW - functionalization
KW - oxygen-containing functional groups
KW - pyrrolic and pyridinic nitrogen inclusions
KW - ion beam irradiation
KW - hydrochloric acid treatment
KW - electrochemical behavior
KW - pseudocapacitance
KW - supercapacitors
KW - nitrogen-containing multi-walled carbon nanotubes
KW - functionalization
KW - oxygen-containing functional groups
KW - pyrrolic and pyridinic nitrogen inclusions
KW - ion beam irradiation
KW - hydrochloric acid treatment
KW - electrochemical behavior
KW - pseudocapacitance
KW - supercapacitors
KW - Nitrogen-containing multi-walled carbon nanotubes
KW - Pyrrolic and pyridinic nitrogen inclusions
KW - Ion beam irradiation
KW - Supercapacitors
KW - Electrochemical behavior
KW - Oxygen-containing functional groups
KW - Functionalization
KW - Pseudocapacitance
KW - Hydrochloric acid treatment
KW - GRAPHENE OXIDE
KW - HYDROXYL-GROUPS
KW - DOPED CARBON
KW - SUPERCAPACITOR PERFORMANCE
KW - X-RAY PHOTOELECTRON
KW - ABSORPTION
KW - ELECTRONIC-STRUCTURE
KW - STORAGE
KW - FUNCTIONAL-GROUPS
KW - CYCLIC VOLTAMMETRY
UR - http://www.scopus.com/inward/record.url?scp=85120904869&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/cdf2f780-9b6e-3d43-a392-620387dba1d2/
U2 - 10.3390/nano11092163
DO - 10.3390/nano11092163
M3 - Article
VL - 11
JO - Nanomaterials
JF - Nanomaterials
SN - 2079-4991
IS - 9
M1 - 2163
ER -
ID: 84903824