Knowledge Management System Of Institute of process engineering,CAS
Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia | |
| Wang, Yixi1,4; Xu, Wenqing1,2; Chen, Xueyan3; Li, Chaoqun1; Xie, Jun1; Yang, Yang1; Zhu, Tingyu1,2; Zhang, Changbin3,4 | |
| 2022-06-15 | |
| Source Publication | JOURNAL OF HAZARDOUS MATERIALS
 |
| ISSN | 0304-3894 |
| Volume | 432Pages:12 |
| Abstract | Gaseous ammonia (NH3) in the atmosphere is potentially harmful to both human health and the environment. The selective catalytic oxidation of NH3 (termed as NH3-SCO) into N-2 and H2O is a promising method for decreasing NH3 emissions. A highly efficient catalyst is required for controlling NH3 emissions by this method in practice. In this study, we prepared Ir/TiO2 catalysts using different crystal structures of TiO2 (rutile, P25 or anatase) as supports by a simple impregnation method and evaluated their performance in the NH3-SCO. We found that the Ir/TiO2-R (rutile) catalyst performed better than the Ir/TiO2-P25 (mixed-phase) and Ir/TiO2-A (anatase) catalyst. High-angle annular dark-field images of the aberration-corrected scanning transmission electron microscopy revealed that the Ir species were mainly atomically dispersed on the TiO2 support in Ir/TiO2-R with 1 wt% Ir loading, whereas the Ir species agglomerated to form clusters or nanoparticles in Ir/TiO2-P25 and Ir/TiO2-A. The combined results of X-ray absorption fine structure, H-2-temperature-programmed reduction, and in situ diffuse reflectance for infrared Fourier Transform spectroscopy studies suggested that atomically dispersed Ir species had stronger electronic metal-support interaction with rutile TiO2, which resulted in easier to adsorb and activate O-2 at the interface and thus, better low-temperature activity of the Ir/TiO2-R catalyst. |
| Keyword | Single-atom catalyst
NH3-SCO Ir/TiO2 Crystal structure Supported catalyst |
| DOI | 10.1016/j.jhazmat.2022.128670 |
| Language | 英语 |
| WOS Keyword | MIXED-OXIDE CATALYST ; SUPPORT INTERACTIONS ; LATTICE STRAIN ; SLIP AMMONIA ; REDUCTION ; MECHANISM ; NOX ; PERFORMANCE ; NITROGEN ; IRO2 |
| Funding Project | National Natural Science Foundation of China[52070180] ; Cultivating Project of Strategic Priority Research Program of Chinese Academy of Sciences[XDPB1902] ; Key Research and Development Project of Shandong Province[2020CXGC011402] |
| WOS Research Area | Engineering ; Environmental Sciences & Ecology |
| WOS Subject | Engineering, Environmental ; Environmental Sciences |
| Funding Organization | National Natural Science Foundation of China ; Cultivating Project of Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research and Development Project of Shandong Province |
| WOS ID | WOS:000782125500004 |
| Publisher | ELSEVIER |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/52814 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Xu, Wenqing; Zhang, Changbin |
| Affiliation | 1.Chinese Acad Sci, Innovat Acad Green Mfg, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Fujian, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| First Author Affilication | Center of lonic Liquids and Green Engineering |
| Corresponding Author Affilication | Center of lonic Liquids and Green Engineering |
| Recommended Citation GB/T 7714 |
Wang, Yixi,Xu, Wenqing,Chen, Xueyan,et al. Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia [J]. JOURNAL OF HAZARDOUS MATERIALS,2022,432:12. |
| APA |
Wang, Yixi.,Xu, Wenqing.,Chen, Xueyan.,Li, Chaoqun.,Xie, Jun.,...&Zhang, Changbin.(2022). Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia .JOURNAL OF HAZARDOUS MATERIALS,432,12. |
| MLA |
Wang, Yixi,et al." Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia ".JOURNAL OF HAZARDOUS MATERIALS 432(2022):12. |
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