Oxalate anions-intercalated NiFe layered double hydroxide as a highly active and stable electrocatalyst for alkaline seawater oxidation

Xiaoyan WANG, Zixiao LI, Shengjun SUN, Hang SUN, Chaoxin YANG, Zhengwei CAI, Hui ZHANG, Meng YUE, Min ZHANG, Hefeng WANG, Yongchao YAO, Qian LIU, Luming LI, Wei CHU, Jianming HU, Xuping SUN, Bo TANG

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1 Citation (Scopus)

Abstract

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-C₂O₄²⁻ LDH/NF)is proposed. The intercalation of these highly negatively charged C₂O₄²⁻ serves to establish electrostatic repulsion and impede Cl adsorption. In alkaline seawater, NiFe- C₂O₄²⁻ LDH/NF requires an overpotential of 337 mV to gain the large current density of 1000mA cm⁻² and operates continuously for 500 h. The intercalation of C₂O₄²⁻ is demonstrated to significantly boost the activity and stability of NiFe LDH-based materials during alkaline seawater oxidation. Copyright © 2024 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)596-603
JournalJournal of Colloid and Interface Science
Volume662
Early online dateFeb 2024
DOIs
Publication statusPublished - May 2024

Citation

Wang, X., Li, Z., Sun, S., Sun, H., Yang, C., Cai, Z., Zhang, H., Yue, M., Zhang, M., Wang, H., Yao, Y., Liu, Q., Li, L., Chu, W., Hu, J., Sun, X., & Tang, B. (2024). Oxalate anions-intercalated NiFe layered double hydroxide as a highly active and stable electrocatalyst for alkaline seawater oxidation. Journal of Colloid and Interface Science, 662, 596-603. https://doi.org/10.1016/j.jcis.2024.02.043

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