Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia
文献类型：期刊论文
| 作者 | Wang, Yixi; Xu, Wenqing; Chen, Xueyan ; Li, Chaoqun; Xie, Jun; Yang, Yang; Zhu, Tingyu; Zhang, Changbin
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2022-06-15 |
| 卷号 | 432期号:0页码:128670 |
| 关键词 | MIXED-OXIDE CATALYST SUPPORT INTERACTIONS LATTICE STRAIN SLIP AMMONIA REDUCTION MECHANISM NOX PERFORMANCE NITROGEN IRO2 |
| ISSN号 | 0304-3894 |
| 英文摘要 | 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. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47426]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Fujian, Peoples R China 4.Chinese Acad Sci, Innovat Acad Green Mfg, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 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(0):128670. |
| 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(0),128670. |
| MLA | Wang, Yixi,et al."Single-atom Ir(1 )supported on rutile TiO2 for excellent selective catalytic oxidation of ammonia".JOURNAL OF HAZARDOUS MATERIALS 432.0(2022):128670. |
入库方式： OAI收割
来源：生态环境研究中心
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