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双功能Mn单原子催化剂用于协同生成和激活H₂O₂:朝着高效的耐火有机废水处理方向

Chen Yu¹, Dawei Liang¹, Chao Qu²

¹School of Material Science and Engineering, Beihang University, Beijing 102206, China.

Journal of hazardous materials

|December 18, 2025

概括

这项研究在碳纳米管上引入了一种单原子催化剂,用于电氧化,显著改善了从垃圾填埋场液中去除耐火有机污染物的方法,降低了能源消耗.

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:

垃圾填埋污水中的耐火有机污染物给环境带来了挑战.
电氧化提供了一个有前途的治疗方法,但受到高能耗和低效的困扰.
开发先进的催化剂对于有效的废水处理至关重要.

研究的目的:

开发一种新型的单原子催化剂 (MnSAC),支持碳纳米管 (CNT),用于增强垃圾填埋污水的电氧化.
研究催化剂在促进过氧化 (H2O2) 生产和激活中的双功能作用.
阐明复杂有机污染物的催化机制并优化复杂有机污染物的电氧化性能.

主要方法:

一个含有MnSAC/CNT的气体扩散电极的制造.
在特定操作条件下进行电化学表征和性能测试 (Ni-Sb-SnO2阳极,10 mA cm−2电流密度).
密度函数理论 (DFT) 计算分析Mn-N4活性位点和H2O2激活机制.

主要成果:

在垃圾填埋场液中实现了90%的化学氧气需求 (COD) 清除率.
证明了同时减少2e−氧气以产生H2O2和在现场激活H2O2到基 (•OH).
DFT的计算证实了Mn-N4位点的有利H2O2激活 (ΔG = -3.46 eV) 和有机吸附.

结论:

MnSAC/CNTs催化剂显著提高了耐火有机物电氧化效率.
Mn-N4位点的协同效应优化了基因生成和污染物降解动力学.
这种方法为处理具有挑战性的废水流提供了可持续和节能的解决方案,最大限度地减少金属漏.

关键词:

2e() 氧气还原反应反应电氧化过程中的电氧化.H(2) O(2) 生产和现场激活.的单个原子催化剂是.耐火有机物废水处理

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