Challenges in Oxygen Evolution on the Nickel-Iron Catalysis: A Critical Review

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:The review provides a comprehensive summary of degradation mechanisms and stability improvement strategies for NiFe OER catalysts.

🏛政策担当者:The review highlights the need for continued investment in electrolyzer R&D to achieve cost-effective green hydrogen.

Green hydrogen production via water electrolysis is a cornerstone of the sustainable energy transition. However, the oxygen evolution reaction (OER) remains the kinetic bottleneck, limiting overall efficiency. Nickel-iron (NiFe) based catalysts are among the most promising non precious materials for the OER in alkaline media, offering high activity and low cost. Nevertheless, their practical application at industrially relevant current densities (>100 mA cm–2) is hindered by several challenges: structural degradation, uncontrolled surface reconstruction, metal dissolution (corrosion), particularly Fe leaching, and the ambiguous role of the fundamental mechanisms. This review critically discusses the current understanding of these degradation pathways, the influence of preparation methods, the interplay between Ni and Fe redox chemistry, and strategies for enhancing long-term stability. Future directions for designing durable NiFe OER electrocatalysts are also outlined. The paper also considered a strategy for investigating new catalysts using electrochemical and non-electrochemical techniques, devoted to young scientists interested in this field. In the Outlook and Perspective, the key drawback is present and the possible strategy for improvement is discussed.

• Research Square https://doi.org/10.20944/preprints202606.2125.v1first seen 2026-07-03 04:29:04 · last seen 2026-07-05 04:33:52