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Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting applicationopen access
- Authors
- Mishra, Rajneesh Kumar; Kumar, Vipin; Choi, Gyu Jin; Ryu, Jeong Won; Mane, Sagar M.; Shin, Jae Cheol; Gwag, Jin Seog
- Issue Date
- Oct-2022
- Publisher
- Elsevier BV
- Keywords
- Hexagonal NiO nanosheets; Hydrogen evolution reaction; Stability; Water splitting; Oxygen evolution reaction
- Citation
- Materials Letters, v.324, pp 1 - 5
- Pages
- 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials Letters
- Volume
- 324
- Start Page
- 1
- End Page
- 5
- ISSN
- 0167-577X
1873-4979
- Abstract
- This study illustrates the catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of the hexagonal NiO nanosheets on Ni-foam. The NiO electrocatalyst demonstrates the low over-potentials of 83 mV/380 mV and low Tafel slopes of 209 mV dec-(1)/299 mV dec(-1) during HER/OER, respectively. It also reveals excellent stability, showing a slight change in overpotentials of 116 mV and 430 mV during HER/OER after 2000 CV cycles. Electrochemical impedance spectroscopy spectra show the series resistance of 0.83 omega/1.04 omega and charge-transfer resistance of 1.63 omega/4.70 omega during HER/OER after 2000 CV cycles.
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Related Researcher
- Shin, Jae Cheol
- College of Engineering (Department of Electronics and Electrical Engineering)