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Identification of relevant active sites and a mechanism study for reverse water gas shift reaction over Pt/CeO2 catalysts
Chen, Xiaodong1,2; Su, Xiong1; Liang, Binglian1,2; Yang, Xiaoli1,2; Ren, Xinyi1; Duan, Hongmin1; Huang, Yanqiang1; Zhang, Tao1
关键词Rwgs Reaction Pt/ceo2 Catalyst Formate Intermediate Mechanism
刊名JOURNAL OF ENERGY CHEMISTRY
2016-11-01
DOI10.1016/j.jechem.2016.11.011
25期:6页:1051-1057
收录类别SCI
文章类型Article
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
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.
语种英语
WOS记录号WOS:000390132200019
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/150507
专题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
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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.
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