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对于诱导Fe-Mo-W/TiO催化剂中活性位点演变的顺序浸的机制性见解:一项多尺度研究

Zhuofan Chen¹, Yanfen Liao¹, Xiaoqian Ma¹

¹Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, Guangzhou 510640, China.

Journal of hazardous materials

|November 1, 2025

概括

优化Fe-Mo-W/TiO2催化剂的浸序列可以提高同时去除氧化 (NOx) 和挥发性有机化合物 (VOC). 优先或Fe+W联合浸为烟气处理提供了优越的催化活性.

科学领域:

催化剂是一种催化剂.
材料科学材料科学材料科学
环境工程环境工程

背景情况:

燃煤发电厂释放大量的氧化 (NOx) 和挥发性有机化合物 (VOC).
有效的催化转换器对于减轻这些有害排放至关重要.
催化剂的合成方法,特别是浸序列,可以显著影响它们的性能.

研究的目的:

研究连续浸对Fe-Mo-W/TiO2催化剂的机械效应.
了解浸顺序如何影响NOx和VOC的协同去除.
为设计优化双金属催化剂建立一个理论框架.

主要方法:

催化剂属性的实验性表征.
分子动力学模拟用于研究金属聚类.
密度函数理论 (DFT) 计算用于吸附行为分析.

主要成果:

优先或Fe+W联合浸显示出更高的NOx和VOCs去除效率 (高达94.8%的NOx,94.4%的,82.5%的).
优先浸减少了表面PZC,促进了Fe2O3的形成和稳定Fe3+.
Fe+W 共同浸防止了金属聚合,而 Fe-first 序列形成了有害的 Fe-Mo 化合物.
DFT揭示了Mo位点主导NO/O2吸附,而Fe位点激活NH3.

结论:

浸序列是设计高效Fe-Mo-W/TiO2催化剂的关键因素.
优化的序列导致NOx和VOC的增强协同去除.
这项研究为通过浸序列控制来设计催化剂提供了理论基础.

关键词:

催化剂催化剂是一种催化剂.多重污染物清除多重污染物清除 NH(3) -SCR 额外债务负债权连续浸的顺序受精.挥发性有机化合物挥发性有机化合物

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