Pawar, Sambhaji M., Pawar, Bharati S., Babar, Pravin T., Ahmed, Abu Talha Aqueel, Chavan, Harish S., Jo, Yongcheol, Cho, Sangeun, Kim, Jongmin, Hou, Bo  ORCID: https://orcid.org/0000-0001-9918-8223, Inamdar, Akbar I., Cha, SeungNam, Kim, Jin Hyeok, Kim, Tae Geun, Kim, Hyungsang and Im, Hyunsik
2019.
Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis.
Applied Surface Science
470
, p. 360.
10.1016/j.apsusc.2018.11.151
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Abstract
Efficient and low‐cost multifunctional electrodes play a key role in improving the performance of energy conversion and storage devices. In this study, ultrathin nanoporous CuCo2O4 nanosheets are synthesized on a nickel foam substrate using electrodeposition followed by air annealing. The CuCo2O4 nanosheet electrode exhibits a high specific capacitance of 1473 F g─1 at 1 A g─1 with a capacity retention of ∼93% after 5000 cycles in 3 M KOH solution. It also works well as an efficient oxygen evolution reaction electrocatalyst, demonstrating an overpotential of 260 mV at 20 mA cm─2 with a Tafel slope of ∼64 mV dec─1. in 1 M KOH solution, which is the lowest reported among other copper-cobalt based transition metal oxide catalysts. The catalyst is very stable at >20 mA cm─2 for more than 25 h. The superior electrochemical performance of the CuCo2O4 nanosheet electrode is due to the synergetic effect of the direct growth of 2D nanosheet structure and a large electrochemically active surface area associated with nanopores on the CuCo2O4 nanosheet surface.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Publisher: | Elsevier |
| ISSN: | 0169-4332 |
| Date of First Compliant Deposit: | 20 February 2020 |
| Date of Acceptance: | 19 November 2018 |
| Last Modified: | 19 Jul 2025 04:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/129535 |
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