NiFe layered double hydroxide with intercalated fluorosilicate anions for industrial-level alkaline seawater oxidation†

IF 4.2 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Science & Technology Pub Date : 2025-07-03 DOI:10.1039/D5CY00677E

Wenlong Jiang, Zixiao Li, Shengjun Sun, Yongsong Luo, Fatma A. Ibrahim, Mohamed S. Hamdy, Imran Shakir, Wenting Li, Jianming Hu, Xuefei Liu and Xuping Sun

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Abstract

Seawater electrolysis for hydrogen production is efficient and promising, but chloride ions (Cl⁻) cause severe anode corrosion, limiting its potential. In this study, we present the intercalation of fluorosilicate anions into NiFe layered double hydroxide nanosheet arrays on Ni foam (SiF₆²⁻-NiFe LDH/NF) as an industrial-level alkaline seawater oxidation catalyst. SiF₆²⁻-NiFe LDH/NF achieves a current density of 1000 mA cm⁻² at an overpotential of 371 mV and maintains good stability for 1000 h. It also exhibits robust stability at higher current densities of 1.5 and 2 A cm⁻². In situ Raman spectroscopy confirms that SiF₆²⁻ promotes the generation of γ-NiOOH and repels Cl⁻, demonstrating excellent tolerance under extreme conditions.

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含氟硅酸阴离子的NiFe层状双氢氧化物用于工业碱性海水氧化†

海水电解制氢是一种高效且有前景的方法，但氯离子（Cl−）会造成严重的阳极腐蚀，限制了其潜力。在本研究中，我们提出了将氟硅酸盐阴离子插入到Ni泡沫（SiF62−-NiFe LDH/NF）上的NiFe层状双氢氧化物纳米片阵列中作为工业级碱性海水氧化催化剂。SiF62−-NiFe LDH/NF在过电位为371 mV时电流密度达到1000 mA cm−2，并在1000 h内保持良好的稳定性，在1.5和2 a cm−2的高电流密度下也表现出良好的稳定性。原位拉曼光谱证实，SiF62−促进γ-NiOOH的生成，并排斥Cl−，在极端条件下表现出优异的耐受性。

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来源期刊

Catalysis Science & Technology CHEMISTRY, PHYSICAL-

CiteScore

8.70

自引率

6.00%

发文量

587

审稿时长

1.5 months

期刊介绍： A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days