A Highly Active and Stable Non-Platinic Lean NOx Trap Catalyst MnOx-K2CO3/K2Ti8O17 with Ultra-Low NOx to N2O Selectivity
文献类型：期刊论文
| 作者 | Zhang, YX ; Liu, DS ; Meng, M ; Jiang, Z ; Zhang, S |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2014 |
| 卷号 | 53期号:20页码:8416—8425 |
| 关键词 | STORAGE-REDUCTION PEROVSKITE CATALYST SOOT COMBUSTION DIESEL EXHAUST NSR CATALYSTS SUPPORT REGENERATION PERFORMANCE STORAGE/REDUCTION OXIDATION |
| ISSN号 | 0888-5885 |
| 通讯作者 | mengm@tju.edu.cn |
| 英文摘要 | A non-platinic lean NOx trap catalyst MnOx-K2CO3/K2Ti8O17 (K2CO3 loading: 25 wt %) was prepared via successive impregnation, which exhibits a large NOx storage capacity (3.21 mmol/g), a high NOx reduction percentage (98.5%) and an ultralow selectivity of NOx to N2O (0.3%). The catalyst was characterized by multiple techniques including XRD, SEM/HRTEM, EXAFS, FT-IR, CO2-TPD and in situ DRIFTS. Except for K2O, -OK groups, surface K2CO3 and bulk or bulk-like K2CO3, an unknown titanate phase with a K/Ti atomic ratio higher than 2/8 is identified, which is also active and regenerative for NOx storage and reduction. In-situ DRIFTS results reveal that NOx is mainly stored as bidentate nitrates and bidentate nitrite species in the catalyst. The appearance of negative bands around 1555 and 1575 cm(-1) (C=O stretching vibration in bidentate carbonates) suggests the involvement of carbonates in NOx storage. Based upon the characterization results, a carbonate-involved NOx storage/reduction mechanism was proposed. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000336417700012 |
| 公开日期 | 2015-03-13 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/13993]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | Zhang, YX,Liu, DS,Meng, M,et al. A Highly Active and Stable Non-Platinic Lean NOx Trap Catalyst MnOx-K2CO3/K2Ti8O17 with Ultra-Low NOx to N2O Selectivity[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2014,53(20):8416—8425. |
| APA | Zhang, YX,Liu, DS,Meng, M,Jiang, Z,&Zhang, S.(2014).A Highly Active and Stable Non-Platinic Lean NOx Trap Catalyst MnOx-K2CO3/K2Ti8O17 with Ultra-Low NOx to N2O Selectivity.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,53(20),8416—8425. |
| MLA | Zhang, YX,et al."A Highly Active and Stable Non-Platinic Lean NOx Trap Catalyst MnOx-K2CO3/K2Ti8O17 with Ultra-Low NOx to N2O Selectivity".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 53.20(2014):8416—8425. |
入库方式： OAI收割
来源：上海应用物理研究所
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