不对称的Fe-N3C协调在Fe单原子位点增加了H2O2的电化学激活,以有效地产生OH
Shiyan Sun1, Peike Cao1, Shuo Chen1
1Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, , PR China.
Water research
|February 14, 2026
概括
在碳纳米花上设计的不对称Fe-N3C位点可以促进基基的产生,从而有效地处理废水. 这种先进的电-芬顿工艺显著地从制药废水中去除有机污染物.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 不同质的电-芬顿 (EF) 工艺利用基基 (•OH) 来降解有机污染物.
- 具有Fe-N4位点的单原子催化剂 (SAC) 与纳米粒子相比具有优势,但由于中位吸附不足,在OH生成方面面临局限性.
- 催化剂中的不对称原子协调在提高EF性能方面尚未得到充分研究.
研究的目的:
- 在碳纳米花 (FeN3C@CNFs) 上设计和研究原子分散的不对称Fe-N3C位点,以提高EF过程中的OH生成.
- 为了比较FeN3C@CNFs与Fe-N4站点的催化性能,以去除有机污染物.
- 通过DFT计算,阐明原子协调在OH电力发电中的作用.
主要方法:
- 碳纳米花与原子分散的Fe-N3C位点 (FeN3C@CNFs) 的合成.
- 使用FeN3C@CNF作为催化剂,电化学激活H2O2 (EAH) 来产生OH.
- 密度函数理论 (DFT) 计算以研究反应机制和能量障碍.
- 在实际的制药废水上测试催化性能,测量TOC和COD.
主要成果:
- 与Fe-N4对应物相比,FeN3C@CNF表现出更高的OH生成和污染物清除效率.
- DFT的计算证实,不对称的Fe-N3C协调促进了H2O2吸附和O-O键裂解,降低了OH形成的能量屏障.
- 该FeN3C@CNFs系统有效地处理了制药废水,将TOC从94.0降至34.1毫克L-1和COD从265.9降至81.3毫克L-1,符合严格的排放标准.
结论:
- 原子分散的不对称Fe-N3C站点在促进废水处理的OH电力发电方面非常有效.
- 设计的FeN3C@CNFs催化剂显示出在制药废水整治中实际应用的巨大潜力.
- 原子协调在优化高级氧化过程的催化剂性能方面发挥着至关重要的作用.
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