Insight into the micro-mechanism of Co doping to improve the deNOx performance and H2O resistance of beta-MnO2 catalysts
文献类型：期刊论文
| 作者 | Liu, Yafang1; Liu, Jun1; Zhu, Baozhong1; Chen, Jiuyu1; Li, Fan2; Sun, Yunlan1 |
| 刊名 | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
 |
| 出版日期 | 2023-04-05 |
| 卷号 | 662页码:13 |
| 关键词 | NH3-SCR DFT Reaction mechanism beta-MnO2 catalyst Co-MnO2 catalyst |
| ISSN号 | 0927-7757 |
| DOI | 10.1016/j.colsurfa.2023.130983 |
| 通讯作者 | Li, Fan(lifan@ms.giec.ac.cn) ; Sun, Yunlan(ylsun@cczu.edu.cn) |
| 英文摘要 | Mn-based catalysts are desirable for selective catalytic reduction (SCR) of NO by NH3 due to their good catalytic activity and environmentally friendliness. However, the deNOx performance of single component MnO2 catalyst fails to meet the requirement and it has poor tolerance to H2O. Co doping can improve the activity and the H2O resistance of the catalysts, but the reaction mechanism remains unclear. Here, the effect of Co doping on the deNOx activity of Mn-based catalysts and the reaction mechanism of gas molecules over the beta-MnO2 (110) surface were revealed by combining experimental measurements and DFT simulations. Results show that the optimal proportion of Co can increase the deNOx efficiency of MnO2 catalysts. Doping Co enhances the adsorption and dehydrogenation of NH3 on the beta-MnO2 catalyst surface. NH2 can combine with NO to form NH2NO. Co doping promotes the breakdown of NH2NO, and the Langmuir-Hinshelwood mechanism dominates this reaction. Furthermore, Co-doped beta-MnO2 catalysts can reduce the competitive adsorption of H2O, which alleviates the poisoning effect of the catalyst. |
| WOS关键词 | REACTION-MECHANISM ; MANGANESE OXIDES ; REDUCTION ; NO ; NH3 ; NH3-SCR ; ADSORPTION ; MN ; SURFACE ; SPINEL |
| 资助项目 | National Natural Science Foundation of China[52076016] ; National Natural Science Foundation of China[51676001] ; Project of Jiangsu Provincial Six Talent Peak[JNHB-097] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX22_3041] ; Hefei advanced computing center |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000998896800001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Project of Jiangsu Provincial Six Talent Peak ; Postgraduate Research & Practice Innovation Program of Jiangsu Province ; Hefei advanced computing center |
| 源URL | [http://ir.giec.ac.cn/handle/344007/39082]  |
| 专题 | 中国科学院广州能源研究所 |
| 通讯作者 | Li, Fan; Sun, Yunlan |
| 作者单位 | 1.Changzhou Univ, Sch Petr & Nat Gas Engn, Changzhou 213164, Jiangsu, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yafang,Liu, Jun,Zhu, Baozhong,et al. Insight into the micro-mechanism of Co doping to improve the deNOx performance and H2O resistance of beta-MnO2 catalysts[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2023,662:13. |
| APA | Liu, Yafang,Liu, Jun,Zhu, Baozhong,Chen, Jiuyu,Li, Fan,&Sun, Yunlan.(2023).Insight into the micro-mechanism of Co doping to improve the deNOx performance and H2O resistance of beta-MnO2 catalysts.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,662,13. |
| MLA | Liu, Yafang,et al."Insight into the micro-mechanism of Co doping to improve the deNOx performance and H2O resistance of beta-MnO2 catalysts".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 662(2023):13. |
入库方式： OAI收割
来源：广州能源研究所
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