Boron-modified Ce-Zr mixed oxide catalysts for improved low-temperature NOx reduction

被引：0
作者：
Wang, Wenhua [1 ]
Luo, Zhanpeng [1 ]
Ying, Qingji [2 ,3 ]
Wang, Xiaoqiang [1 ]
机构：
[1] Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China
[2] Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China
[3] Zhejiang TUNA Environm Sci & Technol Co Ltd, Shaoxing 312000, Peoples R China
来源：
MATERIALS LETTERS | 2025年 / 381卷
基金：
中国博士后科学基金;
关键词：
NH3-SCR; Boron modification; Ce-Zr mixed oxides; Nanoparticles; Composite materials;
D O I：
10.1016/j.matlet.2024.137754
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study explored the promotional effect of nanometal boron (B) modification on SCR performance over Ce-Zr (CZ) mixed oxide catalysts. Experimental results indicated that the optimal B0.3CZ sample achieved over 90 % NO conversion and N2 selectivity within 240-360 degrees C, whereas the pristine CZ sample failed to reach complete NO conversion across the same temperature range. Characterization studies revealed that boron addition formed interactions with Ce/Zr and heightened surface acid strength. Importantly, these interactions enhanced redox capacity and increased surface ratios of Ce3+ and O beta, thereby boosting low-medium SCR activity. Additionally, the strengthened surface acidity improved NH3 adsorption, ensuring high N2 selectivity at elevated temperatures. Overall, nonmetal boron modification might be one promising strategy for promoting catalytic performance in SCR systems.
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页数：4
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