首页|Engineering FeOOH/Ni(OH)2 heterostructures on Ni3S2 surface to enhance seawater splitting

Engineering FeOOH/Ni(OH)2 heterostructures on Ni3S2 surface to enhance seawater splitting

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The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in seawater.Herein,FeOOH/Ni(OH)2 heterostructure sup-ported on Ni3S2-covered nickel foam(Fe-Ni/Ni3S2/NF)was fabricated by hydrothermal and etching methods,as well as anodic oxidation process.The electronic structure of FeOOH and Ni(OH)2 could be modulated after depositing FeOOH nanoparticles on Ni(OH)2 nanosheet,which greatly boosted the catalytic activity.When the catalyst used as an electrode for oxygen evolution reaction(OER),it needed low overpotentials of 266 and 368 mV to achieve current densities of 100 and 800 mA·cm-2,respectively,in 1 mol·L-1 KOH+seawater electrolyte.It can operate continuously at 100 mA·cm-2 for 400 h without obvious decay.Particularly,in situ generated SO42-from inner Ni3S2 during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl-,which seemed to be responsible for superior stability.The study not only syn-thesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.

Anodic oxidationHeterostructureOxygen evolution reactionSeawater splitting

Chen Yang、Ya-Dong Li、Li-Juan Cao、Xi-Long Wang、Han-Pu Liang

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Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China

Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

Sino-Danish College,University of Chinese Academy of Sciences,Beijing 100049,China

National Natural Science Foundation of Shandong ProvinceNational Natural Science Foundation of Shandong ProvinceDNL Cooperation FundResearch Innovation FundDICP and QIBEBT

ZR2022QB062ZR2021MB070DNL202010QIBEBTSZ201801UN201804

2024

10.1007/s12598-023-02590-9

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(5)
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