Ternary composite oxide catalysts CuO/Co3O4-CeO2 with wide temperature-window for the preferential oxidation of CO in H-2-rich stream
文献类型：期刊论文
| ; | |
| 作者 | Chen, YN; Liu, DS; Yang, LJ; Meng, M; Zhang, J; Zheng, LR; Chu, SQ; Hu, TD; Zhang J(张静); Zheng LR(郑黎荣); Chu SQ(储胜启); Hu TD(胡天斗) |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 ; CHEMICAL ENGINEERING JOURNAL
|
| 出版日期 | 2013 ; 2013 |
| 卷号 | 234页码:88-98 |
| 关键词 | CO PROX CuO/Co3O4-CeO2 Temperature-window Characterization Mechanism CO PROX CuO/Co3O4-CeO2 Temperature-window Characterization Mechanism |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2013.08.063 |
| 英文摘要 | A series of ternary composite oxide catalysts CuO/CO3O4-CeO2 with variable Ce/(Co + Ce) atomic ratios were prepared and employed for the preferential oxidation of CO (CO PROX). Many techniques such as N-2-sorption, XRD, H-2-TPR, O-2-TPO, CO-TPD, O-2-TPD, Cu K-edge XAFS (including EXAFS and XANES) and in situ DRIFTS were used for catalyst characterization. The catalyst CuO/CO3O4-CeO2 with Ce/(Ce + Co) ratio of 0.1 exhibits the best performance, showing not only the lowest temperature for the complete oxidation of CO (98 degrees C), but also the broadest operating temperature window for full CO conversion (98-173 degrees C). The results of N-2-sorption and temperature-programmed characterizations including H2-TPR, O-2-TPO, CO-TPD and O-2-TPD show that the CuCoCe10 catalyst possesses the highest BET surface area, the best reducibility/oxidizability and the best performance for CO and O-2 adsorption. Linear combination fitting of Cu K-edge XANES spectra reveals that multiple Cu species including Cu-0, Cu+ and Cu2+ species co-exist in the spent catalyst CuCoCe10. Stable Cu+ carbonyl species are identified as the main active reaction intermediates as revealed by in situ DRIFTS. High temperature (>120 C) can lead to the reduction of Cu+ to Cu-0, enhancing H-2 oxidation; as a result, the selectivity of O-2 towards CO2 is decreased. Based upon in situ DRIFTS results, a potential CO PROX mechanism over CuO/CO3O4-CeO2 catalysts is proposed. (C) 2013 Elsevier B.V. All rights reserved.; A series of ternary composite oxide catalysts CuO/CO3O4-CeO2 with variable Ce/(Co + Ce) atomic ratios were prepared and employed for the preferential oxidation of CO (CO PROX). Many techniques such as N-2-sorption, XRD, H-2-TPR, O-2-TPO, CO-TPD, O-2-TPD, Cu K-edge XAFS (including EXAFS and XANES) and in situ DRIFTS were used for catalyst characterization. The catalyst CuO/CO3O4-CeO2 with Ce/(Ce + Co) ratio of 0.1 exhibits the best performance, showing not only the lowest temperature for the complete oxidation of CO (98 degrees C), but also the broadest operating temperature window for full CO conversion (98-173 degrees C). The results of N-2-sorption and temperature-programmed characterizations including H2-TPR, O-2-TPO, CO-TPD and O-2-TPD show that the CuCoCe10 catalyst possesses the highest BET surface area, the best reducibility/oxidizability and the best performance for CO and O-2 adsorption. Linear combination fitting of Cu K-edge XANES spectra reveals that multiple Cu species including Cu-0, Cu+ and Cu2+ species co-exist in the spent catalyst CuCoCe10. Stable Cu+ carbonyl species are identified as the main active reaction intermediates as revealed by in situ DRIFTS. High temperature (>120 C) can lead to the reduction of Cu+ to Cu-0, enhancing H-2 oxidation; as a result, the selectivity of O-2 towards CO2 is decreased. Based upon in situ DRIFTS results, a potential CO PROX mechanism over CuO/CO3O4-CeO2 catalysts is proposed. (C) 2013 Elsevier B.V. All rights reserved. |
| 学科主题 | Engineering ; Engineering |
| 收录类别 | SCI |
| 电子版国际标准刊号 | 1873-3212 |
| 语种 | 英语 |
| WOS记录号 | WOS:000328588300012 ; WOS:000328588300012 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/223831]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Chen, YN,Liu, DS,Yang, LJ,et al. Ternary composite oxide catalysts CuO/Co3O4-CeO2 with wide temperature-window for the preferential oxidation of CO in H-2-rich stream, Ternary composite oxide catalysts CuO/Co3O4-CeO2 with wide temperature-window for the preferential oxidation of CO in H-2-rich stream[J]. CHEMICAL ENGINEERING JOURNAL, CHEMICAL ENGINEERING JOURNAL,2013, 2013,234, 234:88-98, 88-98. |
| APA | Chen, YN.,Liu, DS.,Yang, LJ.,Meng, M.,Zhang, J.,...&张静；郑黎荣；储胜启；胡天斗.(2013).Ternary composite oxide catalysts CuO/Co3O4-CeO2 with wide temperature-window for the preferential oxidation of CO in H-2-rich stream.CHEMICAL ENGINEERING JOURNAL,234,88-98. |
| MLA | Chen, YN,et al."Ternary composite oxide catalysts CuO/Co3O4-CeO2 with wide temperature-window for the preferential oxidation of CO in H-2-rich stream".CHEMICAL ENGINEERING JOURNAL 234(2013):88-98. |
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。