Unexpected increase in low-temperature NH3-SCR catalytic activity over Cu-SSZ-39 after hydrothermal aging
文献类型：期刊论文
| 作者 | BSRF用户 |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2021 |
| 卷号 | 294页码:120237 |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2021.120237 |
| 文献子类 | Article |
| 英文摘要 | The control of nitrogen oxides (NOx) from heavy-duty diesel vehicles is becoming increasingly urgent due to its detrimental effects on the environment. Cu-SSZ-39, with its exceptional NH3-SCR activity and hydrothermal stability, has attracted more and more attention in the field of diesel vehicle emission control. In this work, an unexpected phenomenon was observed for Cu-SSZ-39 after hydrothermal aging. Generally, the hydrothermal aging process causes deterioration of the catalytic performance of catalysts. However, a remarkable increase in low-temperature NH3-SCR catalytic activity was observed in Cu-SSZ-39 after it was exposed to 850 degrees C hydrothermal aging conditions for 16 h. EPR, DRIFTS, H-2-TPR, UV-vis and XANES were utilized to detect the changes in Cu species. It was determined that a portion of the Cu2+ ions near double six-membered rings (d6r) transformed into CuxOy species after hydrothermal treatment. These CuxOy species facilitated the production of nitrate species which were critical intermediates in the NH3-SCR process, resulting in an increase in low-temperature catalytic activity. |
| 电子版国际标准刊号 | 1873-3883 |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000708020500009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/292943]  |
| 专题 | 北京同步辐射装置 |
| 推荐引用方式 GB/T 7714 | BSRF用户. Unexpected increase in low-temperature NH3-SCR catalytic activity over Cu-SSZ-39 after hydrothermal aging[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2021,294:120237. |
| APA | BSRF用户.(2021).Unexpected increase in low-temperature NH3-SCR catalytic activity over Cu-SSZ-39 after hydrothermal aging.APPLIED CATALYSIS B-ENVIRONMENTAL,294,120237. |
| MLA | BSRF用户."Unexpected increase in low-temperature NH3-SCR catalytic activity over Cu-SSZ-39 after hydrothermal aging".APPLIED CATALYSIS B-ENVIRONMENTAL 294(2021):120237. |
入库方式： OAI收割
来源：高能物理研究所
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