Promotion of surface acidity and surface species of doped Fe and SO42- over CeO2 catalytic for NH3-SCR reaction

被引：52

作者：

Zhang, Xuejun ^{[1
]}

Wang, Junkai ^{[1
]}

Song, Zhongxian ^{[2
]}

Zhao, Heng ^{[1
]}

Xing, Yun ^{[1
]}

Zhao, Min ^{[1
]}

Zhao, Jinggang ^{[1
]}

Ma, Zi'ang ^{[1
]}

Zhang, Peipei ^{[3
]}

Tsubaki, Noritatsu ^{[3
]}

机构：

[1] Shenyang Univ Chem Technol, Coll Environm & Safety Engn, Shenyang 110142, Liaoning, Peoples R China

[2] Henan Univ Urban Construct, Fac Environm & Municipal Engn, Henan Key Lab Water Pollut Control & Rehabil Tech, Pingdingshan 467036, Peoples R China

[3] Toyama Univ, Sch Engn, Dept Appl Chem, Gofuku 3190, Toyama 9308555, Japan

来源：

MOLECULAR CATALYSIS | 2019年 / 463卷

基金：

中国国家自然科学基金;

关键词：

Selective catalytic reduction; Interaction; Surface acidity; Sulfates; LOW-TEMPERATURE SCR; NO REDUCTION; ACTIVE-SITES; NH3; PERFORMANCE; MECHANISM; SO42-/CEO2; OXIDES; MO; TI;

D O I：

10.1016/j.mcat.2018.11.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of CeO2 modified by Fe species was synthesized via one-pot method and used for selective catalytic reduction (SCR) of NOx by NH3. The characterization revealed that an interaction existed among Fe, sulfates and Ce species. The excellent SCR performance was associated with a remarkable increase in chemisorbed oxygen, the ratio of Ce3+/(Ce4+ + Ce3+) and Fe2+/(Fe3+ +Fe2+). Importantly, the introduction of iron oxides and sulfates into the CeO2 increased the surface acidity and redox property, resulting in the improvement of the SCR performance. Thereby, Fe-2(SO4)(3) modification CeO2 showed the excellent catalytic activity, outstanding stability and superior resistance to H2O + SO2.

引用

页码：1 / 7

页数：7

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