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Cobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes as scaffolds for supercapacitors and the CO2 reduction reaction

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dc.contributor.authorYadav, Dharmendra Kumar
dc.contributor.authorOmar, Fatin Saiha
dc.contributor.authorYadav, Mamta
dc.contributor.authorHo, Xian Liang
dc.contributor.authorTessensohn, Malcolm E.
dc.contributor.authorRamesh, K.
dc.contributor.authorRamesh, S.
dc.contributor.authorWebster, Richard D.
dc.contributor.authorGanesan, Vellaichamy
dc.date.accessioned2025-01-30T05:47:46Z
dc.date.available2025-01-30T05:47:46Z
dc.date.issued2021
dc.description.abstractIn 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. � 2021 Elsevier Ltd
dc.identifier.doihttps://doi.org/10.1016/j.est.2021.103312
dc.identifier.issn2352152X
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/24008
dc.publisherElsevier Ltd
dc.subjectCO<sub>2</sub> reduction
dc.subjectElectrocatalysis
dc.subjectMultiwalled carbon nanotubes
dc.subjectSupercapacitors
dc.titleCobalt oxide decorated zirconium oxide immobilized multiwalled carbon nanotubes as scaffolds for supercapacitors and the CO2 reduction reaction
dc.typeArticle
dspace.entity.typePublication
journal.titleJournal of Energy Storage
journalvolume.identifier.volume44

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2021