Modification of Cu/SiO2 Catalysts by La2O3 to Quantitatively Tune Cu+-Cu-0 Dual Sites with Improved Catalytic Activities and Stabilities for Dimethyl Ether Steam Reforming
文献类型：期刊论文
| 作者 | Huang, JJ; Ding, T; Ma, K; Cai, JM; Sun, ZR; Tian, Y; Jiang, Z; Zhang, J; Zheng, LR; Li, XG |
| 刊名 | CHEMCATCHEM
 |
| 出版日期 | 2018 |
| 卷号 | 10期号:17页码:3862-3871 |
| 关键词 | GAS SHIFT REACTION SUPPORTED COPPER-CATALYSTS HYDROGEN-PRODUCTION ETHYLENE-GLYCOL CHEMOSELECTIVE HYDROGENATION GLYCEROL HYDROGENOLYSIS OXALATE HYDROGENATION LANTHANUM OXIDE METHANOL CU |
| ISSN号 | 1867-3880 |
| DOI | 10.1002/cctc.201800421 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Dimethyl ether steam reforming (DME SR) is a promising route to provide H-2 for on-board H-2-based fuel cells. Herein, we synthesized the La2O3-modified Cu/SiO2 catalyst with dual copper species of Cu-0 and Cu+ for DME SR, which exhibits both the high catalytic performance and long-term stability. The strong electron donor-acceptor interaction between the lanthanum and copper species occurs after reduction of the catalysts, which is an essential factor to quantitatively determine the ratio of Cu+/(Cu-0+Cu+). The addition of La can improve the dispersion of both metallic Cu and Cu2O on the catalysts, as well. After modulating the ratio of Cu+/(Cu-0+Cu+) to approximate to 0.5 by varying the La loading, we achieved the highest activity and lowest CO selectivity. After the durability tests, the results of TEM, EXAFS, and XPS reveal that the addition of La on the Cu/SiO2 catalysts not only stabilizes the copper species from aggregation, especially for the metallic Cu, but also avoids over-reduction of the Cu+ species to Cu-0. The constant ratio of Cu+/(Cu-0+Cu+) on the La-modified Cu/SiO2 catalyst ensures the high catalytic stability in DME SR. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31033]  |
| 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 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China 2.Tianjin Univ, Sch Chem Engn & Technol, Tianjin Key Lab Appl Catalysis Sci & Engn, Collaborat Innovat Ctr Chem Sci & Engn, Tianjin 30072, Peoples R China 3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, JJ,Ding, T,Ma, K,et al. Modification of Cu/SiO2 Catalysts by La2O3 to Quantitatively Tune Cu+-Cu-0 Dual Sites with Improved Catalytic Activities and Stabilities for Dimethyl Ether Steam Reforming[J]. CHEMCATCHEM,2018,10(17):3862-3871. |
| APA | Huang, JJ.,Ding, T.,Ma, K.,Cai, JM.,Sun, ZR.,...&Li, XG.(2018).Modification of Cu/SiO2 Catalysts by La2O3 to Quantitatively Tune Cu+-Cu-0 Dual Sites with Improved Catalytic Activities and Stabilities for Dimethyl Ether Steam Reforming.CHEMCATCHEM,10(17),3862-3871. |
| MLA | Huang, JJ,et al."Modification of Cu/SiO2 Catalysts by La2O3 to Quantitatively Tune Cu+-Cu-0 Dual Sites with Improved Catalytic Activities and Stabilities for Dimethyl Ether Steam Reforming".CHEMCATCHEM 10.17(2018):3862-3871. |
入库方式： OAI收割
来源：上海应用物理研究所
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