journal article Dec 06, 2023

In Situ Generation of Molybdate‐Modulated Nickel‐Iron Oxide Electrodes with High Corrosion Resistance for Efficient Seawater Electrolysis

View at Publisher Save 10.1002/aenm.202303261
Abstract
AbstractThe realization of seawater electrolysis requires the development of electrode materials that can meet the requirements of high activity, high selectivity, and corrosion resistance. Herein, this work successfully prepares a molybdate (MoO42−)‐modulated nickel‐iron oxide electrode for seawater electrolysis via a quick and easy thermal shock method, with high activity and extraordinary durability in oxygen evolution reaction (OER) for seawater electrolysis. The experimental analyses and theoretical calculations reveal that the in situ generated MoO42− on the surface of electrode can modulate and stabilize the catalytic active phase γ‐(Ni, Fe)OOH, improving the OER activity, as well as play a critical role in protecting electrode from chloride ions (Cl−) corrosion for extended service life. This catalyst thus displays an evidently slow degradation rate of 20 µV h−1 during a long‐term operation (>1500 h) at 100 mA cm−2. This work provides a new viewpoint for the design of oxyanion‐modified catalysts and can be widely used to address the challenges in seawater electrolysis.
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Published
Dec 06, 2023
Vol/Issue
14(4)
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Funding
National Natural Science Foundation of China Award: 52231008
Natural Science Foundation of Hainan Province Award: 223RC401
Education Department of Hainan Province Award: Hnky2023ZD‐2
Cite This Article
Li Shao, Xindi Han, Lei Shi, et al. (2023). In Situ Generation of Molybdate‐Modulated Nickel‐Iron Oxide Electrodes with High Corrosion Resistance for Efficient Seawater Electrolysis. Advanced Energy Materials, 14(4). https://doi.org/10.1002/aenm.202303261