Highly anti-corrosive NiFe LDHs–NiFe alloy hybrid enables long-term stable alkaline seawater electrolysis

作     者：Jia-Hong Li Hao Chen Si-Hang You Gan-Xin Yang Peng Liu Meng-Qi Gao Shu-Guang Chen Fei-Fei Zhang 

作者机构：School of Materials Science and Engineering Changsha University of Science and Technology Department of Materials Science and Engineering Faculty of Engineering National University of Singapore School of Materials Science and Engineering Jilin University 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2024年第43卷第9期

页      面：4321-4332页

核心收录：

学科分类：081702[工学-化学工艺] 0806[工学-冶金工程] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China (No. 22209054) the Natural Science Foundation of Hunan Province (Nos. 2023JJ30017 and 2023JJ30030) the Natural Science Foundation of Changsha (No. kq2208223) 

主　　题：Bifunctional Corrosion NiFe LDHs Seawater electrolysis Stability 

摘      要：Owing to the signi?cant potential of alkalin seawater electrolysis for converting surplus power into eco friendly hydrogen fuel,we developed bifunctional elec trodes that integrate low-crystalline NiFe LDHs and amorphous NiFe alloy on a Ni foam （NF） substrate to enhance this *** by the battery-like charac teristics of NiFe LDHs,an anti-corrosive and active oute layer of NiFevacOOH continuously forms over time in th hybrid on the anode for the oxygen evolution reaction（OER）,effectively mitigating powder shedding caused by corrosion induced by multiple anions in *** while,the strong bond between the hybrid and the NF substrate maintains intact hybrid coatings to ensure a rel atively high overall conductivity of the electrodes,signif icantly reducing the negative effects of structura degradation during the OER and hydrogen evolution reaction （HER）,as well as the accumulation of contami nants on the electrode *** long-term tests,thes bifunctionalhybridelectrodesmaintained stable performance,even at a high current density o500 mA·*** cell voltage increased by only 88 m V over 1000 h to 1.970 V during saline electrolysis and by103 mV over 500 h to 2.062 V during seawater electroly ***,this study provides valuable insights into ef?cient and stable seawater electrolysis using NiFe LDHs–NiFe alloy hybrids.