Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162876
Title: Cobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes as scaffolds for supercapacitors and the CO₂ reduction reaction
Authors: Yadav, Dharmendra Kumar
Omar, Fatin Saiha
Yadav, Mamta
Ho, Xian Liang
Tessensohn, Malcolm Eugene
Ramesh, K.
Ramesh, S.
Webster, Richard David
Ganesan, Vellaichamy
Keywords: Science::Chemistry
Issue Date: 2021
Source: Yadav, D. K., Omar, F. S., Yadav, M., Ho, X. L., Tessensohn, M. E., Ramesh, K., Ramesh, S., Webster, R. D. & Ganesan, V. (2021). Cobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes as scaffolds for supercapacitors and the CO₂ reduction reaction. Journal of Energy Storage, 44(Part A), 103312-. https://dx.doi.org/10.1016/j.est.2021.103312
Journal: Journal of Energy Storage
Abstract: In the field of renewable energy research, the development of materials for use as highly efficient supercapacitors and designing electrocatalytic materials for the reduction of CO2 to produce useful chemicals are envisaged as two important sustainable routes. However, developing stable, selective, and efficient materials for these purposes is a highly challenging task requiring numerous design attempts. In this work, cobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes (MWCNTs-ZrO2-Co3O4) is reported as a catalyst and battery electrode material for the electrochemical reduction of CO2 and supercapacitor applications, respectively. The MWCNTs-ZrO2-Co3O4 electrode assembled for the supercapacitor shows a specific capacity of 258.9 C/g at a current density of 1.0 A/g. The MWCNTs-ZrO2-Co3O4 and activated carbon (AC) based asymmetric supercapacitor (MWCNTs-ZrO2-Co3O4//AC) displays specific energy in the range of 8.9 Wh/kg (at 837.2 W/kg) to 6.23 Wh/kg (at 1674.4 W/kg). The device, MWCNTs-ZrO2-Co3O4//AC displays high cycling stability with 97% capacity retention after 7000 cycles at a current density of 1.0 A/g. In the electrocatalytic reduction of CO2, the MWCNTs-ZrO2-Co3O4 scaffold produces selectively formic acid during the electrolysis at -1.1 V (vs. Ag/AgCl) in 0.1 M aqueous KCl solution. These results indicate that MWCNTs-ZrO2-Co3O4 can serve as a bifunctional material.
URI: https://hdl.handle.net/10356/162876
ISSN: 2352-152X
DOI: 10.1016/j.est.2021.103312
Rights: © 2021 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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