Highly efficient NOx reduction with superior H2O and SO2 resistance on Ce-Ti/γ-Fe2O3 dual single-atom Catalysts: Synergistic interactions and mechanistic insights

被引：2
作者：
Ding, Jianping [1 ]
Zhou, Xiaoyan [1 ]
Yang, Zhengzheng [1 ]
Liu, Changgeng [1 ]
Sun, Mingchao [1 ]
Yang, Congling [1 ]
Fan, Lu [1 ,2 ]
机构：
[1] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610066, Peoples R China
[2] Minist Educ China, Key Lab Land Resources Evaluat & Monitoring Southw, Chengdu 610066, Peoples R China
来源：
FUEL | 2025年 / 387卷
关键词：
Dual single-atom catalyst; NH3-SCR; DFT calculations; SO2/H2O tolerance; TEMPERATURE; NH3-SCR; NH3; OXIDATION; SCR;
D O I：
10.1016/j.fuel.2025.134418
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this study, a novel strategy was proposed for synthesizing dual single-atom Ce-Ti catalysts supported on gamma-Fe2O3 via ball milling and calcination. Compared to gamma-Fe2O3 and single-atom Ce/gamma-Fe2O3 and Ti/gamma-Fe2O3 catalysts, the Ce-Ti/gamma-Fe2O3 catalyst exhibits superior NO conversion rates and significantly enhanced tolerance to H2O and SO2 at 200-240 degrees C. These advancements are attributed to the synergistic interactions between Ce and Ti, which enhance redox properties, increase Lewis acid site density, and facilitate the Langmuir-Hinshelwood reaction pathway. In-situ DRIFTS and density functional theory (DFT) analyses revealed the mechanistic role of surface-active oxygen species and intermediate formation in promoting the SCR reaction. The findings provide valuable mechanistic insights and establish a scalable approach for the development of high-performance, environmentally friendly catalysts for industrial NOx removal.
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页数：9
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