析氧
碱性水电解
过电位
电解
催化作用
电解质
无机化学
化学工程
氢氧化物
电极
分解水
电解水
化学
碱性电池
镍
海水
材料科学
电化学
冶金
有机化学
海洋学
物理化学
光催化
工程类
地质学
作者
Dongdong Wang,Lili Liu,Yue Liu,Wenhao Luo,Yuan Xie,Tongsan D. Xiao,Yinhu Wang,Zhihui Song,Heng Zhang,Xindong Wang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-11-08
卷期号:11 (46): 16479-16490
被引量:3
标识
DOI:10.1021/acssuschemeng.3c03918
摘要
The lack of highly efficient and long-term stable catalysts for the oxygen evolution reaction (OER) severely hampers the advancement of alkaline seawater electrolysis. Herein, a hierarchical superaerophobic OER catalyst electrode, FeOOH/CoFe layered double hydroxide (FeOOH/CoFe LDH), has been prepared on nickel foam through a one-step hydrothermal reaction as an efficient OER catalyst for alkaline seawater electrolysis. The hierarchical nanostructure provides abundant active sites for the catalyst; the superaerophobic property ensures sufficient contact between the catalysts and the electrolyte, and the interaction between FeOOH and CoFe LDH further enhances the OER activity. The FeOOH/CoFe LDH catalytic electrode exhibits remarkable OER performance in simulated seawater solution (1.0 M KOH + 0.5 M NaCl). Specifically, at an industrial current density of 400 mA cm–2, the overpotentials are just 320 mV at 25 °C and 257 mV at 60 °C. Meanwhile, after 300 h of stability testing at a current density of 100 mA cm–2, the overpotential of the electrode increases by a mere 19 mV. This work will afford a simple approach for designing effective electrodes for alkaline seawater electrolysis.
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