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Single Ir Atoms Anchored on Ordered Mesoporous WO3 Are Highly Efficient for the Selective Catalytic Reduction of NO with CO under Oxygen-rich Conditions

文献类型：期刊论文

作者Jiang, Ruihuan6,7; Liu, Shaomian7; Li, Liang6,7; Ji, Yongjun1; Li, Huifang7; Guo, Xiangfeng2; Jia, Lihua6; Zhong, Ziyi3,4; Su, Fabing5,7
刊名CHEMCATCHEM
出版日期2021-02-12
页码14
关键词Ir single-atom ordered mesoporous WO3 CO plus NO reaction oxygen-rich condition
ISSN号1867-3880
DOI10.1002/cctc.202001784
英文摘要Under oxygen-rich conditions, achieving a selective and efficient reduction of NO by CO is always challenging. Here, we report the synthesis of the catalyst consisting of single Ir atoms anchored on mesoporous WO3 (denoted as Ir-1/m-WO3) using a facile template method followed by wet impregnation. X-ray diffraction and transmission electron microscope studies indicated that the Ir atoms were distributed uniformly on the internal surface of m-WO3. When tested for the reduction of NO by CO, the Ir-1/m-WO3 catalyst with a low Ir loading of 0.28 wt % exhibited excellent catalytic performance in the presence of 2 vol % O-2 (volume ratio of CO to O-2 being 1 : 10), achieving a NO conversion of 73 % and N-2 selectivity of 100 % at 350 degrees C. In particular, its turnover frequency (TOF) value reached 0.30 s(-1) at 200 degrees C, which is six times higher than that of the catalyst with Ir nanoparticles supported on mesoporous WO3 (0.05 s(-1)). The superior catalytic performance of Ir-1/m-WO3 is attributed to the formation of the isolated Ir atoms and the more newly generated Ir-WO3 interfaces that can promote the adsorption and activation of NO, and the presence of accessible mesopores in m-WO3 that facilitates the mass transfer of NO and CO. This study brings a new fundamental understanding of active sites in Ir-based catalysts for the CO+NO reaction and provides a new way to the design and synthesis of single-atom catalysts, especially precious metal catalysts for emissions control.
资助项目Beijing Chenxi Environmental Engineering Co., Ltd ; Science Research Project of the Ministry of Education of Heilongjiang Province of China[135309116] ; Guangdong Key discipline fund ; Research Foundation for Advanced Talents of Beijing Technology and Business University[19008020159] ; Research and Development and Cultivation Projects of the Ministry of Education of Heilongjiang Province of China[TSTAU-R2018006]
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000617298000001
出版者WILEY-V C H VERLAG GMBH
资助机构Beijing Chenxi Environmental Engineering Co., Ltd ; Science Research Project of the Ministry of Education of Heilongjiang Province of China ; Guangdong Key discipline fund ; Research Foundation for Advanced Talents of Beijing Technology and Business University ; Research and Development and Cultivation Projects of the Ministry of Education of Heilongjiang Province of China
源URL[http://ir.ipe.ac.cn/handle/122111/43428]  
专题中国科学院过程工程研究所
通讯作者Ji, Yongjun; Jia, Lihua; Su, Fabing
作者单位1.Beijing Technol & Business Univ, Sch Light Ind, Beijing 100048, Peoples R China
2.Guangdong Univ Petrochem Technol, Coll Chem, Maoming 525000, Guangdong, Peoples R China
3.Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, Shantou 515063, Peoples R China
4.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel
5.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China
6.Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Heilongjiang, Peoples R China
7.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Jiang, Ruihuan,Liu, Shaomian,Li, Liang,et al. Single Ir Atoms Anchored on Ordered Mesoporous WO3 Are Highly Efficient for the Selective Catalytic Reduction of NO with CO under Oxygen-rich Conditions[J]. CHEMCATCHEM,2021:14.
APA Jiang, Ruihuan.,Liu, Shaomian.,Li, Liang.,Ji, Yongjun.,Li, Huifang.,...&Su, Fabing.(2021).Single Ir Atoms Anchored on Ordered Mesoporous WO3 Are Highly Efficient for the Selective Catalytic Reduction of NO with CO under Oxygen-rich Conditions.CHEMCATCHEM,14.
MLA Jiang, Ruihuan,et al."Single Ir Atoms Anchored on Ordered Mesoporous WO3 Are Highly Efficient for the Selective Catalytic Reduction of NO with CO under Oxygen-rich Conditions".CHEMCATCHEM (2021):14.

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来源：过程工程研究所

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