Boosting the electrocatalytic activity and stability of Ni/NiO toward the oxygen evolution reaction by coupling FeOOH nanosheets

Wang, Yajing; Zhu, Quanxi; Zhang, Peng; Liu, Songli; Wang, Jiankang

doi:10.1039/d4nj01114g

New J. Chem.

2024

DOI: 10.1039/d4nj01114g

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Boosting the electrocatalytic activity and stability of Ni/NiO toward the oxygen evolution reaction by coupling FeOOH nanosheets

Yajing Wang,

Quanxi Zhu,

Peng Zhang

et al.

Abstract: The unsatisfactory performance of oxygen evolution reaction (OER) and complex preparation method are the main challenges, hindering the OER electrocatalyst’s industrial application in electrochemical water splitting for hydrogen production. Herein,...

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Effect of α-FeOOH in KOH Electrolytes on the Activity of NiO Electrodes in Alkaline Water Electrolysis for the Oxygen Evolution Reaction

Kim,

Jeon,

Kim

et al. 2024

Catalysts

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Iron cation impurities reportedly enhance the oxygen evolution reaction (OER) activity of Ni-based catalysts, and the enhancement of OER activity by Fe cations has been extensively studied. Meanwhile, Fe salts, such as iron hydroxide and iron oxyhydroxide, in the electrolyte improve the OER performance, but the distinct roles of Fe cations and Fe salts have not been fully clarified or differentiated. In this study, NiO electrodes were synthesized, and their OER performance was evaluated in KOH electrolytes containing goethite (α-FeOOH). Unlike Fe cations, which enhance the performance via incorporation into the NiO structure, α-FeOOH boosts OER activity by adsorbing onto the electrode surface. Surface analysis revealed trace amounts of α-FeOOH on the NiO surface, indicating that physical contact alone enables α-FeOOH to adsorb onto NiO. Moreover, interactions between α-FeOOH and NiO were observed, suggesting their potential role in OER activity enhancement. These findings suggest that Fe salts in the electrolyte influence OER performance and should be considered in the development of OER electrodes.

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Effect of α-FeOOH in KOH Electrolytes on the Activity of NiO Electrodes in Alkaline Water Electrolysis for the Oxygen Evolution Reaction

Kim,

Jeon,

Kim

et al. 2024

Catalysts

View full text Add to dashboard Cite

show abstract

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Boosting the electrocatalytic activity and stability of Ni/NiO toward the oxygen evolution reaction by coupling FeOOH nanosheets

Abstract: The unsatisfactory performance of oxygen evolution reaction (OER) and complex preparation method are the main challenges, hindering the OER electrocatalyst’s industrial application in electrochemical water splitting for hydrogen production. Herein,...

Cited by 1 publication

References 33 publications

Effect of α-FeOOH in KOH Electrolytes on the Activity of NiO Electrodes in Alkaline Water Electrolysis for the Oxygen Evolution Reaction

Effect of α-FeOOH in KOH Electrolytes on the Activity of NiO Electrodes in Alkaline Water Electrolysis for the Oxygen Evolution Reaction

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