Tailoring the Electronic Structure of Single Ag Atoms in Ag/WO3 for Efficient NO Reduction by CO in the Presence of O2
文献类型：期刊论文
| Author | Ji, Yongjun1; Chen, Xiaoli1; Liu, Shaomian2; Song, Shaojia3; Xu, Wenqing2; Jiang, Ruihuan2,5; Chen, Wenxing6; Li, Huifang2; Zhu, Tingyu2; Li, Zhenxing3 |
| Source | ACS CATALYSIS
 |
| Issued Date | 2023-01-05 |
| Pages | 1230-1239 |
| Keyword | local-structure control Ag single atoms CO-SCR catalytic performance O2 resistance |
| ISSN | 2155-5435 |
| DOI | 10.1021/acscatal.2c05048 |
| English Abstract | Developing efficient catalysts for the selective catalytic reduction of NOx by CO (CO-SCR) is the key challenge for commercializing this technology. Ag-based catalysts with relatively low costs are promising but widely believed to be not efficient enough for this reaction. Here, we demonstrate that atomically dispersed Ag supported on ordered mesoporous WO3 (mWO3) can serve as a highly active catalyst for CO-SCR under O2-containing conditions. By altering the amount of the Ag precursor, the local environment of the Ag atom coordinated with the O atom can be tailored. Furthermore, at 250 degrees C and an O2/CO ratio of 2.5:1, 0.3Ag/m-WO3 (0.3 wt % Ag) with six-coordinated Ag-O exhibited much better catalytic performance than 5 Ag/m-WO3 (5 wt % Ag) with two coordinated Ag-O (e.g., 0.43 vs 0.02 molNO gAg -1 h-1 in the reaction rate) and previously reported Ag-based catalysts in the literature. The theoretical calculations confirm that the six-coordinated Ag atoms in 0.3Ag/m-WO3 possess a more positive oxidation state and a higher d-band center than the two-coordinated Ag atoms in 5Ag/m-WO3, promoting its bonding strength with co adsorption of the critical intermediates of N2O* and CO*. This work provides a feasible route for regulating the local environment of a Ag single atomic catalyst to enhance its catalytic property for CO-SCR. |
| WOS Keyword | SELECTIVE CATALYTIC-REDUCTION ; SITU FTIR SPECTROSCOPY ; NITRIC-OXIDE ; PERFORMANCE ; REGENERATOR ; ADDITIVES ; SCR |
| Funding Project | National Natural Science Foundation of China[21978299] ; National Natural Science Foundation of China[52222005] ; National Natural Science Foundation of China[52070180] ; National Natural Science Foundation of China[51938014] ; Beijing Chenxi Environmental Engineering Co., Ltd. ; 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant[2020LKSFG09A] ; Guang-dong Key discipline fund (2022) ; Research Foundation for Advanced Talents of Beijing Technology and Business University[19008020159] ; Beijing Technology and Business University[19008022056] |
| WOS Research Area | Chemistry |
| Language | 英语 |
| WOS ID | WOS:000911962600001 |
| Publisher | AMER CHEMICAL SOC |
| Funding Organization | National Natural Science Foundation of China ; Beijing Chenxi Environmental Engineering Co., Ltd. ; 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant ; Guang-dong Key discipline fund (2022) ; Research Foundation for Advanced Talents of Beijing Technology and Business University ; Beijing Technology and Business University |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/56542]  |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Ji, Yongjun; Xu, Wenqing; Li, Zhenxing; Su, Fabing |
| Affiliation | 1.Beijing Technol & Business Univ, Sch Light Ind, Beijing 100048, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China 3.China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China 4.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China 5.Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Heilongjiang, Peoples R China 6.Beijing Inst Technol, Energy & Catalysis Ctr, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 7.Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, Shantou 515063, Peoples R China 8.Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel 9.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Ji, Yongjun,Chen, Xiaoli,Liu, Shaomian,et al. Tailoring the Electronic Structure of Single Ag Atoms in Ag/WO3 for Efficient NO Reduction by CO in the Presence of O2[J]. ACS CATALYSIS,2023:1230-1239. |
| APA | Ji, Yongjun.,Chen, Xiaoli.,Liu, Shaomian.,Song, Shaojia.,Xu, Wenqing.,...&Su, Fabing.(2023).Tailoring the Electronic Structure of Single Ag Atoms in Ag/WO3 for Efficient NO Reduction by CO in the Presence of O2.ACS CATALYSIS,1230-1239. |
| MLA | Ji, Yongjun,et al."Tailoring the Electronic Structure of Single Ag Atoms in Ag/WO3 for Efficient NO Reduction by CO in the Presence of O2".ACS CATALYSIS (2023):1230-1239. |
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来源：过程工程研究所
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