Pawar, Sambhaji M., Pawar, Bharati S., Hou, Bo  ORCID: https://orcid.org/0000-0001-9918-8223, Kim, Jongmin, Ahmed, Abu Talha Aqueel, Chavan, Harish. S., Jo, Yongcheol, Cho, Sangeun, Inamdar, Akbar I., Gunjakar, Jayavant L., Kim, Hyungsang, Cha, SeungNam and Im, Hyunsik
2017.
Self-assembled two-dimensional copper oxide nanosheet bundles as an efficient oxygen evolution reaction (OER) electrocatalyst for water splitting applications.
Journal of Materials Chemistry A
5
(25)
, pp. 12747-12751.
10.1039/C7TA02835K
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Abstract
A high activity of a two-dimensional (2D) copper oxide (CuO) electrocatalyst for the oxygen evolution reaction (OER) is presented. The CuO electrode self-assembles on a stainless steel substrate via chemical bath deposition at 80 °C in a mixed solution of CuSO4 and NH4OH, followed by air annealing treatment, and shows a 2D nanosheet bundle-type morphology. The OER performance is studied in a 1 M KOH solution. The OER starts to occur at about 1.48 V versus the RHE (η = 250 mV) with a Tafel slope of 59 mV dec−1 in a 1 M KOH solution. The overpotential (η) of 350 mV at 10 mA cm−2 is among the lowest compared with other copper-based materials. The catalyst can deliver a stable current density of >10 mA cm−2 for more than 10 hours. This superior OER activity is due to its adequately exposed OER-favorable 2D morphology and the optimized electronic properties resulting from the thermal treatment.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2050-7488 |
| Date of First Compliant Deposit: | 5 February 2020 |
| Date of Acceptance: | 2 June 2017 |
| Last Modified: | 19 Jul 2025 04:30 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/129339 |
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