A review on the characterization of metal active sites over Cu-based and Fe-based zeolites for NH3-SCR

被引：24

作者：

Chen, Jialing ^{[1
]}

Huang, Wei ^{[1
]}

Bao, Sizhuo ^{[1
]}

Zhang, Wenbo ^{[1
]}

Liang, Tingyu ^{[2
]}

Zheng, Shenke ^{[3
]}

Yi, Lan ^{[1
]}

Guo, Li ^{[1
]}

Wu, Xiaoqin ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Hubei Prov Coal Convers & New Carbon Mat, Wuhan 430081, Peoples R China

[2] Wuhan Inst Technol, Sch Chem Engn & Pharm, Wuhan 430205, Peoples R China

[3] Huanggang Normal Univ, Sch Chem & Chem Engn, Hubei Key Lab Proc & Applicat Catalyt Mat, Huanggang 438000, Peoples R China

来源：

RSC ADVANCES | 2022年 / 12卷 / 43期

基金：

中国国家自然科学基金;

关键词：

SELECTIVE CATALYTIC-REDUCTION; X-RAY-ABSORPTION; HYDROTHERMAL STABILITY; INFRARED-SPECTROSCOPY; FTIR CHARACTERIZATION; N2O DECOMPOSITION; REACTION-KINETICS; OXIDE CATALYSTS; SSZ-13; ZEOLITE; SCR CATALYSTS;

D O I：

10.1039/d2ra05107a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Cu-based and Fe-based zeolites are promising catalysts for NH3-SCR due to their high catalytic activity, wide temperature window and good hydrothermal stability, while the detailed investigation of NH3-SCR mechanism should be based on the accurate determination of active metal sites. This review systematically summarizes the qualitative and quantitative determination of metal active sites in Cu-based or Fe-based zeolites for NH3-SCR reactions based on advanced characterization methods such as UV-vis absorption (UV-vis), temperature-programmed reduction with H-2 (H-2-TPR), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure spectroscopy (XAFS), Infrared spectroscopy (IR), Electron paramagnetic resonance (EPR), Mossbauer spectroscopy and DFT calculations. The application and limitations of different characterization methods are also discussed to provide insights for further study of the NH3-SCR reaction mechanism over metal-based zeolites.

引用

页码：27746 / 27765

页数：20

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