Seawater electrolysis is gaining recognition as a promising method for hydrogen production. However, severe anode corrosion caused by the high concentration of chloride ions (Cl) poses a challenge for the long-term oxygen evolution reaction. Herein, an anti-corrosion strategy of oxalate anions intercalation in NiFe layered double hydroxide on nickel foam (NiFe-CO LDH/NF) is proposed. The intercalation of these highly negatively charged CO serves to establish electrostatic repulsion and impede Cl adsorption. In alkaline seawater, NiFe-CO LDH/NF requires an overpotential of 337 mV to gain the large current density of 1000 mA cm and operates continuously for 500 h. The intercalation of CO is demonstrated to significantly boost the activity and stability of NiFe LDH-based materials during alkaline seawater oxidation.
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| http://dx.doi.org/10.1016/j.jcis.2024.02.043 | DOI Listing |
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