CAS OpenIR
Single Ir Atoms Anchored on Ordered Mesoporous WO3 Are Highly Efficient for the Selective Catalytic Reduction of NO with CO under Oxygen-rich Conditions
Jiang, Ruihuan1,2; Liu, Shaomian2; Li, Liang1,2; Ji, Yongjun3; Li, Huifang2; Guo, Xiangfeng4; Jia, Lihua1; Zhong, Ziyi5,6; Su, Fabing2,7
2021-02-12
Source PublicationCHEMCATCHEM
ISSN1867-3880
Pages14
AbstractUnder 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.
KeywordIr single-atom ordered mesoporous WO3 CO plus NO reaction oxygen-rich condition
DOI10.1002/cctc.202001784
Language英语
Funding ProjectBeijing 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 Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationBeijing 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
WOS IDWOS:000617298000001
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/43429
Collection中国科学院过程工程研究所
Corresponding AuthorJi, Yongjun; Jia, Lihua; Su, Fabing
Affiliation1.Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Heilongjiang, Peoples R China
2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
3.Beijing Technol & Business Univ, Sch Light Ind, Beijing 100048, Peoples R China
4.Guangdong Univ Petrochem Technol, Coll Chem, Maoming 525000, Guangdong, Peoples R China
5.Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, Shantou 515063, Peoples R China
6.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel
7.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China
Recommended Citation
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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