Benzoate anions-intercalated NiFe-layered double hydroxide nanosheet array with enhanced stability for electrochemical seawater oxidation  

作　　者：Longcheng Zhang Jie Liang Luchao Yue Kai Dong Jun Li Donglin Zhao Zerong Li Shengjun Sun Yongsong Luo Qian Liu Guanwei Cui Abdulmohsen Ali Alshehri Xiaodong Guo Xuping Sun 

机构地区：[1]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China [2]School of Chemical Engineering,Sichuan University,Chengdu 610065,China [3]Institute for Advanced Study,Chengdu University,Chengdu 610106,China [4]College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Jinan 250014,China [5]Chemistry Department,Faculty of Science,King Abdulaziz University,P.O.Box 80203,Jeddah 21589,Saudi Arabia

出　　处：《Nano Research Energy》2022年第3期35-43,共9页纳米能源研究（英文）

基　　金：supported by the National Natural Science Foundation of China(No.21575137).

摘　　要：Seawater electrolysis is an extremely attractive approach for harvesting clean hydrogen energy,but detrimental chlorine species(i.e.,chloride and hypochlorite)cause severe corrosion at the anode.Here,we report our recent finding that benzoate anions-intercalated NiFe-layered double hydroxide nanosheet on carbon cloth(BZ-NiFe-LDH/CC)behaves as a highly efficient and durable monolithic catalyst for alkaline seawater oxidation,affords enlarged interlayer spacing of LDH,inhibits chlorine(electro)chemistry,and alleviates local pH drop of the electrode.It only needs an overpotential of 320 mV to reach a current density of 500 mA·cm^(−2)in 1 M KOH.In contrast to the fast activity decay of NiFe-LDH/CC counterpart during long-term electrolysis,BZ-NiFe-LDH/CC achieves stable 100-h electrolysis at an industrial-level current density of 500 mA·cm^(−2)in alkaline seawater.Operando Raman spectroscopy studies further identify structural changes of disorderedδ(NiIII-O)during the seawater oxidation process.

关 键 词：seawater oxidation layered double hydroxide three-dimensional(3D)self-supported electrocatalysts ANTICORROSION operando Raman spectroscopy 

分 类 号：TQ116.2[化学工程—无机化工] O646[理学—物理化学]