首页|Enhancing the stability of NiFe-layered double hydroxide nanosheet array for alkaline seawater oxidation by Ce doping

Enhancing the stability of NiFe-layered double hydroxide nanosheet array for alkaline seawater oxidation by Ce doping

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Electrocatalytic hydrogen production from seawater holds enormous promise for clean energy genera-tion.Nevertheless,the direct electrolysis of seawater encounters significant challenges due to poor ano-dic stability caused by detrimental chlorine chemistry.Herein,we present our recent discovery that the incorporation of Ce into NiFe layered double hydroxide nanosheet array on Ni foam(Ce-NiFe LDH/NF)emerges as a robust electrocatalyst for seawater oxidation.During the seawater oxidation process,CeO2 is generated,effectively repelling Cl-and inhibiting the formation of ClO-,resulting in a notable enhancement in the oxidation activity and stability of alkaline seawater.The prepared Ce-NiFe LDH/NF requires only overpotential of 390 mV to achieve the current density of 1 A cm-2,while maintaining long-term stability for 500 h,outperforming the performance of NiFe LDH/NF(430 mV,150 h)by a sig-nificant margin.This study highlights the effectiveness of a Ce-doping strategy in augmenting the activity and stability of materials based on NiFe LDH in seawater electrolysis for oxygen evolution.

Ce dopingNiFe layered double hydroxideSeawater oxidationElectrocatalysisCl-repulsion

Yongchao Yao、Shengjun Sun、Hui Zhang、Zixiao Li、Chaoxin Yang、Zhengwei Cai、Xun.He、Kai Dong、Yonglan Luo、Yan Wang、Yuchun Ren、Qian Liu、Dongdong Zheng、Weihua Zhuang、Bo Tang、Xuping Sun、Wenchuang(Walter)Hu

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Department of Laboratory Medicine,West China Hospital,Sichuan University,Chengdu 610041,Sichuan,China

College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Jinan 250014,Shandong,China

Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,Sichuan,China

Institute for Advanced Study,Chengdu University,Chengdu 610106,Sichuan,China

Laoshan Laboratory,Qingdao 266237,Shandong,China

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Free Exploration Project of Frontier Technology for Laoshan Laboratory国家自然科学基金国家自然科学基金

16-022207201521927811

2024

10.1016/j.jechem.2024.01.011

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.91(4)
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