Yadav, Dharmendra Kumar and Omar, Fatin Saiha and Yadav, Mamta and Ho, Xian Liang and Tessensohn, Malcolm E. and Ramesh, Kasi and T. Subramaniam, Ramesh and Webster, Richard D. and Ganesan, Vellaichamy (2021) Cobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes as scaffolds for supercapacitors and the CO2 reduction reaction. Journal of Energy Storage, 44 (A). ISSN 2352-152X, DOI https://doi.org/10.1016/j.est.2021.103312.
Full text not available from this repository.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 super capacitor (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.
| Item Type: | Article |
|---|---|
| Funders: | DST-ASEAN program [IMRC/AISTDF/RD/P-16/2018], University Grants Commission, India |
| Uncontrolled Keywords: | Multiwalled carbon nanotubes; Supercapacitors; Electrocatalysis |
| Subjects: | Q Science > QC Physics T Technology > TP Chemical technology |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 13 Jun 2022 00:59 |
| Last Modified: | 13 Jun 2022 00:59 |
| URI: | http://eprints.um.edu.my/id/eprint/34295 |
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