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延长Fe基阴极电活化过氧化硫酸盐寿命的关键:表面氧气

Mengqi Bu¹, Li Yi², Yingjie Wen²

¹Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China; Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

Journal of environmental sciences (China)

|December 29, 2025

概括

工程铁和氧气保护层显著延长铁泡阴极在过氧化硫酸盐 (PDS) 先进的氧化过程中的使用寿命,克服了污染物降解增强的漏问题.

科学领域:

材料科学材料科学材料科学
环境化学环境化学
电化学电化学电化学

背景情况:

使用电活化过氧化硫酸盐 (PDS) 的先进氧化工艺 (AOP) 对污染物降解有希望.
阴极漏限制了铁基电催化剂在PDS激活中的寿命和效率.

研究的目的:

为铁泡阴极开发一种保护层,以提高其稳定性和使用寿命.
调查表面氧气在防止铁漏和稳定阴极结构中的作用.
为了阐明PDS电激活和阿特拉津降解的机制.

主要方法:

制造 γ-FeOOH/Fe 泡和 α-Fe2O3/Fe 泡保护层.
扩展电化学测试以确定阴极使用寿命.
结构分析 (例如,XRD,SEM) 和密度函数理论 (DFT) 模拟.
对过氧化二硫酸盐激活和阿特拉降解途径的研究.

主要成果:

与裸体Fe泡 (18小时) 相比,具有保护层 (γ-FeOOH/Fe泡和α-Fe2O3/Fe泡) 的工程Fe泡阴极显示出显著延长的使用寿命 (53小时和47小时).
表面氧气被认为对固定Fe离子和形成稳定的Fe3O4至关重要,从而减少Fe漏.
观察到类似的伪第一阶动力学,表明尽管增长了寿命,但催化活性仍然保持.

结论:

含有铁和氧气的保护层有效地提高了PDS电激活中的基于Fe的阴极的寿命.
表面氧气在稳定基于Fe的阴极以防止泄漏方面发挥着至关重要的作用.
这项研究有助于开发用于环境修复应用的耐用电催化剂.

关键词:

电气激活方式电气激活长寿的人生长寿的人生过氧化二硫酸盐的使用保护层是一种保护层.

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