DOI: 10.1016/j.jcou.2017.07.004
Scopus记录号: 2-s2.0-85026914680
论文题名: CeCu composite catalyst for CO synthesis by reverse water-gas shift reaction: Effect of Ce/Cu mole ratio
作者: Zhou G. ; Dai B. ; Xie H. ; Zhang G. ; Xiong K. ; Zheng X.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21 起始页码: 292
结束页码: 301
语种: 英语
英文关键词: CeCu composite catalyst
; CO
; CO2
; Resource utilization
; RWGS reaction
Scopus关键词: Binary alloys
; Carbon dioxide
; Catalyst activity
; Catalyst selectivity
; Catalysts
; Cerium alloys
; Chemical shift
; Cobalt
; Oxygen
; Oxygen vacancies
; Tungsten alloys
; Vacancies
; Composite catalysts
; Enhanced catalytic activity
; Resource utilizations
; Reverse water gas shift
; Reverse water-gas shift reaction
; RWGS reaction
; Surface oxygen vacancies
; Synergistic interaction
; Water gas shift
英文摘要: In this study, CeCu composite catalysts with different Ce/Cu mole ratios were prepared by a hard-template, and their performances in the reverse water-gas shift (RWGS) reaction were investigated. The catalysts were characterized using H2-TPR, XRD, in-situ XPS, AAS, CO2-TPD, and H2-TPD. The characterizations showed that the oxygen vacancies and active Cu0 species as active sites were formed in the CeCu catalysts by the H2 reduction at 400 °C. The synergistic effect of the surface oxygen vacancies and active Cu0 species enhanced catalytic activity of the studied CeCu composite catalysts. The electronic effect between Cu and Ce species boosted the adsorption and activation performances of the reactant CO2 and H2 molecules on the corresponding CeCu catalysts. The Ce1.1Cu1 catalyst demonstrated high stability and the highest CO2 conversion rate in the RWGS reaction, reaching 1.38 mmol gcat -1 min-1 at 400 °C. Its excellent catalytic performance in the RWGS reaction was related to the complete synergistic interaction between the active species via Ce3+-□-Cu0 (□: oxygen vacancy). A CeCu composite material is a superior catalyst for the RWGS reaction because of its high CO2 conversion, 100% CO selectivity, and high stability. © 2017 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52645
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Zhou G.,Dai B.,Xie H.,et al. CeCu composite catalyst for CO synthesis by reverse water-gas shift reaction: Effect of Ce/Cu mole ratio[J]. Journal of CO2 Utilization,2017-01-01,21