| Authors | Zahra Kasipour Rasteh Kenari,Ahmad Ahmadi Daryakenari,Arash Montazeri,فرشاد بوربور اژدری,Mohammad Mahdi Kasipour |
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| Journal | Journal of Electroanalytical Chemistry |
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| Page number | 119799 |
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| Volume number | 1006 |
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| IF | ثبت نشده |
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| Paper Type | Full Paper |
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| Published At | 2026-01-13 |
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| Journal Grade | Scientific - research |
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| Journal Type | Electronic |
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| Journal Country | Iran, Islamic Republic Of |
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| Journal Index | ISC ,JCR ,SCOPUS |
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| Keywords | Keywords: NiO nanoparticles OER performance Anodic electrodeposition Binder, free electrocatalyst Oxygen vacancies |
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Abstract
Developing high-performance, durable, and cost-effective electrocatalysts for the oxygen evolution reaction
(OER) is pivotal for green hydrogen generation. In this research, the elctrocatalysts of the NiO nanostructures are
directly electrodeposited onto a graphite substrate through a facile and binder-free anodic strategy. It was found
that the applied deposition potential is a powerful electrochemical parameter to control the morphology, defect
density, and the OER efficiency of the obtained NiO layers. The electrodeposition process, when performed at an
optimized potential of 2.0 V, fabricates very tiny NiO nanoparticles that possess a high density of oxygen vacancies. This electrode fabricated at 2.0 V exhibits a proper OER activity in alkaline media, acquiring a high
current density of 324 mA⋅cm− 2 at 1.8 V vs. RHE. After 24-h stability testing, the NiO-2 V electrode maintained a
current density of ~200 mA/cm2 at 1.65 V vs. RHE, significantly outperforming the NiO-1 V electrode, which
stabilized at only ~10 mA/cm2
