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题名: Promoting role of potassium in the reverse water gas shift reaction on Pt/mullite catalyst
作者: Liang, Binglian1, 2;  Duan, Hongmin1;  Su, Xiong1;  Chen, Xiaodong1, 2;  Huang, Yanqiang1;  Chen, Xiaowei3;  Jose Delgado, Juan3;  Zhang, Tao1
关键词: Reverse water gas shift reaction ;  Potassium ;  Platinum ;  Mullite
刊名: CATALYSIS TODAY
发表日期: 2017-03-01
DOI: 10.1016/j.cattod.2016.02.051
卷: 281, 页:319-326
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The promotional effect of potassium in the reverse water gas shift reaction (RWGS) was studied for Pt/mullite catalyst. The addition of potassium on Pt/mullite significantly enhanced the CO2 conversion and hindered the formation of methane as a by-product. The turnover frequency (TOF) at 340 degrees C was enhanced by potassium up to 7 times that of Pt/mullite. TEM observations indicated a slight Pt particle size growth on the K-promoted sample. Characterization results by means of H-2-TPR and XPS revealed the strong interaction between KOx and Pt, which stabilized the Pt in a higher oxidation state. DRIFTS observation under the RWGS conditions suggested that the newly created interface between KOx and Pt served as the active site for formate decomposition to produce CO. The presence of potassium also weakened the strength of CO adsorption on Pt, which hindered the further hydrogenation of CO into CH4 through C-O bond dissociation. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: CARBON-DIOXIDE HYDROGENATION ;  PALLADIUM CATALYSTS ;  CO2 HYDROGENATION ;  PT/TIO2 CATALYSTS ;  PARTICLE-SIZE ;  FORM METHANOL ;  REDUCTION ;  MECHANISM ;  OXIDATION ;  COADSORPTION
语种: 英语
WOS记录号: WOS:000390623300011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/151837
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Cadiz, Fac Ciencias, Dept Ciencia Mat & Ingn Met & Quim Inorgan, Cadiz, Spain

Recommended Citation:
Liang, Binglian,Duan, Hongmin,Su, Xiong,et al. Promoting role of potassium in the reverse water gas shift reaction on Pt/mullite catalyst[J]. CATALYSIS TODAY,2017,281:319-326.
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