Chinese Journal of Catalysis ›› 2025, Vol. 70: 388-398.DOI: 10.1016/S1872-2067(24)60215-9

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Electrochemistry assisted chlorine corrosion strategy: The minute-level fabrication of lattice Cl- functioned high spin-polarized Ni/Fe-LDH array for enhanced anti-Cl- OER performance

Bo Zhanga, Ru Xiaoa, Liyuan Liua, Xiaobin Liub, Ying Denga,*(), Qingliang Lvb, Zexing Wua, Yunmei Dub, Yanyan Lia,c, Zhenyu Xiaoa,*(), Lei Wanga,*()   

  1. aKey Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
    bShandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
    cShandong Institute of Hydrogen Energy Technology, China EV100, Jinan 250117, Shandong, China
  • Received:2024-11-01 Accepted:2024-12-09 Online:2025-03-18 Published:2025-03-20
  • Contact: * E-mail:dengyingchem@163.com (Y. Deng),inorgxiaozhenyu@163.com (Z. Xiao),inorchemwl@126.com (L. Wang).
  • Supported by:
    National Natural Science Foundation of China(52272222);National Natural Science Foundation of China(52072197);National Natural Science Foundation of China(52372205);Natural Science Foundation of Shandong Province, China(ZR2023MB142);Science and Technology Support Plan for Youth Innovation of Colleges and Universities in Shandong Province(2022KJ308);Science and Technology Support Plan for Youth Innovation of Colleges and Universities in Shandong Province(2019KJC004);Qingdao Postdoctoral Researcher Applied Research Project(QDBSH20230102046);Postdoctoral Innovative Talents Support Program of Shandong Province, China(SDBX2022025);China Postdoctoral Science Foundation(2023M731858);China Postdoctoral Science Foundation(2024T170451);Taishan Scholar Young Talent Program(tsqn201909114)

Abstract:

Although the intermittent energy-driven direct seawater splitting technology provides an unparalleled approach to achieving sustainable development, the severe corrosion via aggressive Cl- severely affects the stability and efficiency of the anode catalyst and limits its industrial application. Herein, a lattice Cl- functioned NiFe-LDH electrode (E-NF-LDHCl or E-NF-LDHSW) is firstly constructed by a minute-level electrochemistry assisted chlorine corrosion strategy, which presents enhanced oxygen evolution reaction (OER) performance and excellent anti-Cl- corrosion behavior for seawater splitting. The optimized E-NF-LDHCl and E-NF-LDHSW deliver low OER overpotential of 355 and 384 mV to reach 1 A cm−2 current density in the 1 mol L-1 KOH and 1 mol L-1 KOH seawater, respectively, as well as excellent stability of E-NF-LDHCl is maintained at 1 A cm-2 for 400 h in the 1 mol L-1 KOH and 1 mol L-1 KOH + 0.5 mol L-1 NaCl. MD (molecular dynamics) simulation and DFT (density functional theory) calculation confirmed that strong common-ion repulsion effect in IHP region repels free Cl-, forming high spin polarization centers and more single electrons to enhance the intrinsic activity of OER.

Key words: Layered double hydroxides, Oxygen evolution reaction, Seawater splitting, Anti-Cl- corrosion, High spin polarization