In-situ DRIFTS and XANES identification of copper species in the ternary composite oxide catalysts CuMnCeO during CO preferential oxidation
文献类型：期刊论文
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| 作者 | Jin, H; You, R; Zhou, S; Ma, K; Meng, M; Zheng, LR; Zhang, J; Hu, TD; Zheng LR(郑黎荣) ; Zhang J(张静)
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| 刊名 | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
 ; INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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| 出版日期 | 2015 ; 2015 |
| 卷号 | 40期号:10页码:3919-3931 |
| 关键词 | CO PROX CuMnCeO Copper species In-situ XANES In-situ DRIFTS CO PROX CuMnCeO Copper species In-situ XANES In-situ DRIFTS |
| ISSN号 | 0360-3199 |
| DOI | 10.1016/j.ijhydene.2015.01.086 |
| 文献子类 | Article |
| 英文摘要 | A series of CuMnCeO catalysts with 10% CuO (weight loading) and variable atomic ratios of Mn/Mn + Ce (0, 0.02, 0.05 or 0.10) were synthesized by co-precipitation and employed for CO preferential oxidation (CO PROX). After doping a small amount of manganese into ceria, the catalysts show improved catalytic performance as compared with the undoped one, especially the catalyst with the Mn/Mn + Ce atomic ratio of 0.05 (CMC-0.05) which displays the lowest temperatures for half CO conversion (T-50 = 73 degrees C) and full CO conversion (T-100 = 108 degrees C). In addition, it also exhibits the widest temperature window of full CO conversion (108-149 degrees C) and 100% selectivity of oxygen to CO2 below 117 degrees C. As revealed by XRD and UV-Raman, the presence of appropriate amount of Mn cannot only enhance the formation of Ce-Cu-Mn-O ternary oxide solid solution with fluorite structure, inhibiting the growth of CeO2 crystallite size, but also increase the oxygen vacancies. The results of H-2-TPR and XPS indicate that the reducibility and amount of surface oxygen species of CMC-0.05 are also improved, both of which are beneficial to catalytic performance. In situ XANES results suggest that the bulk copper species still remain as Cu2+ ions below 200 degrees C even in H-2-rich CO PROX atmosphere; however, the in-situ DRIFTS spectra indicate that during CO PROX below 120 degrees C the surface copper species are Cu+ ions which are regarded as the main active sites for CO PROX; above 120 degrees C Cu-0 species appear, which enhance H-2 oxidation, decreasing the oxygen to CO2 selectivity. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.; A series of CuMnCeO catalysts with 10% CuO (weight loading) and variable atomic ratios of Mn/Mn + Ce (0, 0.02, 0.05 or 0.10) were synthesized by co-precipitation and employed for CO preferential oxidation (CO PROX). After doping a small amount of manganese into ceria, the catalysts show improved catalytic performance as compared with the undoped one, especially the catalyst with the Mn/Mn + Ce atomic ratio of 0.05 (CMC-0.05) which displays the lowest temperatures for half CO conversion (T-50 = 73 degrees C) and full CO conversion (T-100 = 108 degrees C). In addition, it also exhibits the widest temperature window of full CO conversion (108-149 degrees C) and 100% selectivity of oxygen to CO2 below 117 degrees C. As revealed by XRD and UV-Raman, the presence of appropriate amount of Mn cannot only enhance the formation of Ce-Cu-Mn-O ternary oxide solid solution with fluorite structure, inhibiting the growth of CeO2 crystallite size, but also increase the oxygen vacancies. The results of H-2-TPR and XPS indicate that the reducibility and amount of surface oxygen species of CMC-0.05 are also improved, both of which are beneficial to catalytic performance. In situ XANES results suggest that the bulk copper species still remain as Cu2+ ions below 200 degrees C even in H-2-rich CO PROX atmosphere; however, the in-situ DRIFTS spectra indicate that during CO PROX below 120 degrees C the surface copper species are Cu+ ions which are regarded as the main active sites for CO PROX; above 120 degrees C Cu-0 species appear, which enhance H-2 oxidation, decreasing the oxygen to CO2 selectivity. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Chemistry; Electrochemistry; Energy & Fuels ; Chemistry; Electrochemistry; Energy & Fuels |
| 类目[WOS] | Chemistry, Physical ; Electrochemistry ; Energy & Fuels |
| 收录类别 | SCI ; EI |
| 电子版国际标准刊号 | 1879-3487 |
| WOS研究方向 | Chemistry, Physical ; Electrochemistry ; Energy & Fuels |
| 语种 | 英语 |
| WOS记录号 | WOS:000350939900014 ; WOS:000350939900014 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228227]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Jin, H,You, R,Zhou, S,et al. In-situ DRIFTS and XANES identification of copper species in the ternary composite oxide catalysts CuMnCeO during CO preferential oxidation, In-situ DRIFTS and XANES identification of copper species in the ternary composite oxide catalysts CuMnCeO during CO preferential oxidation[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2015, 2015,40, 40(10):3919-3931, 3919-3931. |
| APA | Jin, H.,You, R.,Zhou, S.,Ma, K.,Meng, M.,...&胡天斗.(2015).In-situ DRIFTS and XANES identification of copper species in the ternary composite oxide catalysts CuMnCeO during CO preferential oxidation.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,40(10),3919-3931. |
| MLA | Jin, H,et al."In-situ DRIFTS and XANES identification of copper species in the ternary composite oxide catalysts CuMnCeO during CO preferential oxidation".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 40.10(2015):3919-3931. |
入库方式： OAI收割
来源：高能物理研究所
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