Identification of relevant active sites and a mechanism study for reverse water gas shift reaction over Pt/CeO2 catalysts
文献类型：期刊论文
| 作者 | Chen, Xiaodong1,2; Su, Xiong1; Liang, Binglian1,2; Yang, Xiaoli1,2; Ren, Xinyi1; Duan, Hongmin1; Huang, Yanqiang1; Zhang, Tao1 |
| 刊名 | JOURNAL OF ENERGY CHEMISTRY
 |
| 出版日期 | 2016-11-01 |
| 卷号 | 25期号:6页码:1051-1057 |
| 关键词 | RWGS reaction Pt/CeO2 catalyst Formate intermediate Mechanism |
| 英文摘要 | Reverse water gas shift (RWGS) reaction can serve as a pivotal stage in the CO2 conversion processes, which is vital for the utilization of CO2. In this study, RWGS reaction was performed over Pt/CeO2 catalysts at the temperature range of 200-500 degrees C under ambient pressure. Compared with pure CeO2, Pt/CeO2 catalysts exhibited superior RWGS activity at lower reaction temperature. Meanwhile, the calculated TOF and E-a values are approximately the same over these Pt/CeO2 catalysts pretreated under various calcination conditions, indicating that the RWGS reaction is not affected by the morphologies of anchored Pt nanoparticles or the primary crystallinity of CeO2. TPR and XPS results indicated that the incorporation of Pt promoted the reducibility of CeO2 support and remarkably increased the content of Ce 3 + sites on the catalyst surface. Furthermore, the CO TPSR-MS signal under the condition of pure CO2 flow over Pt/CeO 2 catalyst is far lower than that under the condition of adsorbed CO2 with H-2 -assisted flow, revealing that CO2 molecules adsorbed on Ce3+ active sites have difficult in generating CO directly. Meanwhile, the adsorbed CO2 with the assistance of H-2 can form formate species easily over Ce3+ active sites and then decompose into Ce3+-CO species for CO production, which was identified by in-situ FTIR. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B. V. and Science Press. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical |
| 研究领域[WOS] | Chemistry ; Energy & Fuels ; Engineering |
| 关键词[WOS] | CO2 REDUCTION ; PT/TIO2 CATALYSTS ; CARBON-DIOXIDE ; LIGHT OLEFINS ; HYDROGENATION ; DRIFTS ; NANOPARTICLES ; REDUCIBILITY ; CONVERSION ; FORMATES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000390132200019 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/150507]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Xiaodong,Su, Xiong,Liang, Binglian,et al. Identification of relevant active sites and a mechanism study for reverse water gas shift reaction over Pt/CeO2 catalysts[J]. JOURNAL OF ENERGY CHEMISTRY,2016,25(6):1051-1057. |
| APA | Chen, Xiaodong.,Su, Xiong.,Liang, Binglian.,Yang, Xiaoli.,Ren, Xinyi.,...&Zhang, Tao.(2016).Identification of relevant active sites and a mechanism study for reverse water gas shift reaction over Pt/CeO2 catalysts.JOURNAL OF ENERGY CHEMISTRY,25(6),1051-1057. |
| MLA | Chen, Xiaodong,et al."Identification of relevant active sites and a mechanism study for reverse water gas shift reaction over Pt/CeO2 catalysts".JOURNAL OF ENERGY CHEMISTRY 25.6(2016):1051-1057. |
入库方式： OAI收割
来源：大连化学物理研究所
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