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 | Zheng LR(郑黎荣) ; Huang, JJ; Ding, T; Ma, K; Cai, JM; Sun, ZR; Tian, Y; Jiang, Z; Zhang, J; Zheng, LR
|
| 刊名 | CHEMCATCHEM
 |
| 出版日期 | 2018 |
| 卷号 | 10期号:17页码:3862-3871 |
| 关键词 | Lanthanum Cu SiO2 steam reforming dimethyl ether stability |
| ISSN号 | 1867-3880 |
| DOI | 10.1002/cctc.201800421 |
| 文献子类 | Article |
| 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. |
| 电子版国际标准刊号 | 1867-3899 |
| WOS关键词 | GAS SHIFT REACTION ; SUPPORTED COPPER-CATALYSTS ; HYDROGEN-PRODUCTION ; ETHYLENE-GLYCOL ; CHEMOSELECTIVE HYDROGENATION ; GLYCEROL HYDROGENOLYSIS ; OXALATE HYDROGENATION ; LANTHANUM OXIDE ; METHANOL ; CU |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000443935100032 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286309]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 |
| 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 | Zheng LR,Huang, JJ,Ding, T,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 | 郑黎荣.,Huang, JJ.,Ding, T.,Ma, K.,Cai, JM.,...&张静.(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 | 郑黎荣,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：高能物理研究所
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