Molecular-Level Insight into Selective Catalytic Reduction of NOx with NH3 to N-2 over a Highly Efficient Bifunctional V-alpha-MnOx Catalyst at Low Temperature
文献类型：期刊论文
| 作者 | Xin, Y; Li, H; Zhang, NN; Zheng LR(郑黎荣) ; Zhang, ZL; Cao, XM; Hu, P; erson, JA; Zheng, LR; Li, Q
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| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:6页码:4937-4949 |
| 关键词 | nitrogen oxides selective catalytic reduction bifunctional catalyst density functional theory mechanism |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.8b00196 |
| 文献子类 | Article |
| 英文摘要 | Selective catalytic reduction of NOx with ammonia (SCR) is not only an important model catalytic reaction but is also significant in terms of improving environmental air quality and human health. However, SCR catalysts suffer from low activity and selectivity to N-2 at low temperature, which in part may be attributed to our limited understanding of the reaction mechanism. Here, an unambiguous molecular-level mechanism is presented for an improved low-temperature SCR activity using bifunctional catalysts composed of highly active oxides (Mn2O3) for NH3 activation and highly selective vanadates (Mn2V2O7) that promote N-2 formation. NH3 is initially activated by Mn2O3 to form an NH2 intermediate. Transfer of NH2 to Mn2V2P7 then takes place, which facilitates the capture of gaseous NO leading to the formation of NH2NO over Mn2V2O7, whereafter NH2NO is efficiently converted to the preferred N-2 rather than the undesired byproduct, N2O. The proximity of the two components achieved via sol gel preparation plays a crucial role in the transfer of active intermediates. |
| WOS关键词 | MANGANESE OXIDE CATALYSTS ; TOTAL-ENERGY CALCULATIONS ; TI AMORPHOUS OXIDES ; WAVE BASIS-SET ; ACTIVE-SITES ; HYBRID CATALYSTS ; NITRIC-OXIDE ; MNOX-CEO2 CATALYST ; REACTION-MECHANISM ; SUPERIOR CATALYST |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000434369600020 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285988]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Xin, Y,Li, H,Zhang, NN,et al. Molecular-Level Insight into Selective Catalytic Reduction of NOx with NH3 to N-2 over a Highly Efficient Bifunctional V-alpha-MnOx Catalyst at Low Temperature[J]. ACS CATALYSIS,2018,8(6):4937-4949. |
| APA | Xin, Y.,Li, H.,Zhang, NN.,郑黎荣.,Zhang, ZL.,...&Li, Q.(2018).Molecular-Level Insight into Selective Catalytic Reduction of NOx with NH3 to N-2 over a Highly Efficient Bifunctional V-alpha-MnOx Catalyst at Low Temperature.ACS CATALYSIS,8(6),4937-4949. |
| MLA | Xin, Y,et al."Molecular-Level Insight into Selective Catalytic Reduction of NOx with NH3 to N-2 over a Highly Efficient Bifunctional V-alpha-MnOx Catalyst at Low Temperature".ACS CATALYSIS 8.6(2018):4937-4949. |
入库方式： OAI收割
来源：高能物理研究所
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