Selective catalytic reduction of NOx with NH3 over core-shell Ce@W catalyst

被引：9

作者：

Chen, Ruiyang ^{[1
,2
]}

Peng, Sha ^{[1
,2
]}

Wang, Yao ^{[1
,2
]}

Qi, Xiaoying ^{[3
]}

Liu, Zhiming ^{[1
,2
]}

机构：

[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[2] Beijing Univ Chem Technol, Beijing Key Lab Energy Environm Catalysis, Beijing 100029, Peoples R China

[3] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Standardizat & Measurement Nanotechnol, Beijing 100190, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2023年 / 41卷 / 07期

基金：

中国国家自然科学基金;

关键词：

NH3-SCR; Nitrogen oxides; Ce@W; In situ DRIFTs; Rare earths; MIXED-OXIDE CATALYST; NH3-SCR; RESISTANCE; PROMOTION; SCR; MN;

D O I：

10.1016/j.jre.2023.01.005

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

An environmentally benign WO3 wrapped cubic CeO2 core-shell catalyst (Ce@W) was developed for the selective catalytic reduction of NOx with NH3. Compared with CeW particles prepared via the conven-tional co-precipitation method, this core-shell catalyst not only displays higher tolerance to SO2 and H2O, but also exhibits a wider activity temperature window of 250-450 & DEG;C, in which NOx conversion and N2 selectivity reaches 100%. The improved performance of Ce@W catalysts can be contributed to the strong interactions between CeO2 (100) and WO3, which generates more Ce3+ and surface chemisorbed oxygen. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) reveal that the more thermally stable Bronsted acid sites on Ce@W lead to its excellent high-temperature activity.& COPY; 2023 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.

引用

页码：959 / 964

页数：6

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