Evolution mechanism of transition metal in NH3-SCR reaction over Mn-based bimetallic oxide catalysts: Structure-activity relationships
文献类型：期刊论文
| ; | |
| 作者 | BSRF用户 |
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 ; JOURNAL OF HAZARDOUS MATERIALS
|
| 出版日期 | 2021 ; 2021 |
| 卷号 | 413页码:125361 |
| ISSN号 | 0304-3894 ; 0304-3894 |
| DOI | 10.1016/j.jhazmat.2021.125361 ; 10.1016/j.jhazmat.2021.125361 |
| 文献子类 | Article ; Article |
| 英文摘要 | The unexpected phenomenon in which different transition metals (Co, Ni and Cu) presented significant variation of participation levels as the auxiliaries in Mn-based bimetallic oxide catalysts were reported here. It is found that the Co element more easily to form Mn enriched surface bimetallic oxides with Mn than Ni and Cu, resulting in Co-MnOx exhibited the best deNO(x) activity and SO2 tolerance, followed by Ni-MnOx and Cu-MnOx . The role of different transition metal and structure-activity relationships were systematically investigated by advanced techniques including Synchrotron XAFS and in situ DRIFTs analysis. The excellent activity of Co-MnO x was related to its unique Mn-enriched surface (Co2+)tet(Mn3+ Co3+)octO(4) structure with Mn cations occupying the octahedral sites, which is superior to the Ni-MnOx and Cu-MnOx with Mn-lean surface. In addition, the reaction energy barrier of Co-MnOx is weakened due to the lower electron cloud density around the Mn atom as compared to Ni-MnOx and Cu-MnOx . Moreover, Co-MnOx benefiting from the rapid electron migration between Mn and Co, more active bidentate/bridged nitrates could react with adsorbed NH 3 in faster reaction rates following the L-H mechanism.; The unexpected phenomenon in which different transition metals (Co, Ni and Cu) presented significant variation of participation levels as the auxiliaries in Mn-based bimetallic oxide catalysts were reported here. It is found that the Co element more easily to form Mn enriched surface bimetallic oxides with Mn than Ni and Cu, resulting in Co-MnOx exhibited the best deNO(x) activity and SO2 tolerance, followed by Ni-MnOx and Cu-MnOx . The role of different transition metal and structure-activity relationships were systematically investigated by advanced techniques including Synchrotron XAFS and in situ DRIFTs analysis. The excellent activity of Co-MnO x was related to its unique Mn-enriched surface (Co2+)tet(Mn3+ Co3+)octO(4) structure with Mn cations occupying the octahedral sites, which is superior to the Ni-MnOx and Cu-MnOx with Mn-lean surface. In addition, the reaction energy barrier of Co-MnOx is weakened due to the lower electron cloud density around the Mn atom as compared to Ni-MnOx and Cu-MnOx . Moreover, Co-MnOx benefiting from the rapid electron migration between Mn and Co, more active bidentate/bridged nitrates could react with adsorbed NH 3 in faster reaction rates following the L-H mechanism. |
| 电子版国际标准刊号 | 1873-3336 ; 1873-3336 |
| WOS研究方向 | Engineering ; Engineering ; Environmental Sciences & Ecology ; Environmental Sciences & Ecology |
| 语种 | 英语 ; 英语 |
| WOS记录号 | WOS:000647728600004 ; WOS:000647728600004 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/292988]  |
| 专题 | 北京同步辐射装置 |
| 推荐引用方式 GB/T 7714 | BSRF用户. Evolution mechanism of transition metal in NH3-SCR reaction over Mn-based bimetallic oxide catalysts: Structure-activity relationships, Evolution mechanism of transition metal in NH3-SCR reaction over Mn-based bimetallic oxide catalysts: Structure-activity relationships[J]. JOURNAL OF HAZARDOUS MATERIALS, JOURNAL OF HAZARDOUS MATERIALS,2021, 2021,413, 413:125361, 125361. |
| APA | BSRF用户.(2021).Evolution mechanism of transition metal in NH3-SCR reaction over Mn-based bimetallic oxide catalysts: Structure-activity relationships.JOURNAL OF HAZARDOUS MATERIALS,413,125361. |
| MLA | BSRF用户."Evolution mechanism of transition metal in NH3-SCR reaction over Mn-based bimetallic oxide catalysts: Structure-activity relationships".JOURNAL OF HAZARDOUS MATERIALS 413(2021):125361. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。