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Promoting role of potassium in the reverse water gas shift reaction on Pt/mullite catalyst
Liang, Binglian1,2; Duan, Hongmin1; Su, Xiong1; Chen, Xiaodong1,2; Huang, Yanqiang1; Chen, Xiaowei3; Jose Delgado, Juan3; Zhang, Tao1
KeywordReverse Water Gas Shift Reaction Potassium Platinum Mullite
Source PublicationCATALYSIS TODAY
2017-03-01
DOI10.1016/j.cattod.2016.02.051
Volume281Pages:319-326
Indexed BySCI ; ISTP
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordCARBON-DIOXIDE HYDROGENATION ; PALLADIUM CATALYSTS ; CO2 HYDROGENATION ; PT/TIO2 CATALYSTS ; PARTICLE-SIZE ; FORM METHANOL ; REDUCTION ; MECHANISM ; OXIDATION ; COADSORPTION
AbstractThe 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.
Language英语
WOS IDWOS:000390623300011
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/151837
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Liang, Binglian.,Duan, Hongmin.,Su, Xiong.,Chen, Xiaodong.,Huang, Yanqiang.,...&Zhang, Tao.(2017).Promoting role of potassium in the reverse water gas shift reaction on Pt/mullite catalyst.CATALYSIS TODAY,281,319-326.
MLA Liang, Binglian,et al."Promoting role of potassium in the reverse water gas shift reaction on Pt/mullite catalyst".CATALYSIS TODAY 281(2017):319-326.
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