DICP OpenIR
Characterization of Rh-based catalysts with EPR, TPR, IR and XPS
Wang, Y; Song, Z; Ma, D; Luo, HY; Liang, DB; Bao, XH
KeywordCharacterization Rh Catalyst Epr Tpr Ir Xps
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
1999-12-15
Volume149Issue:1-2Pages:51-61
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
WOS KeywordSUPPORTED RHODIUM CATALYSTS ; CO HYDROGENATION ; PROMOTED RHODIUM ; SYNGAS ; ACETALDEHYDE ; MANGANESE ; PRESSURE ; RHMN/NAY ; MN
AbstractRh-based catalysts to be used for the synthesis of C-2-oxygenates from syngas were characterized with EPR, TPR, IR and XPS methods. The chemical state of the Mn component was extensively studied with EPR after in situ reduction and treatment with various probe molecules. The results indicated that on the Mn/SiO2 catalyst, Mn can exist as isolated Mn2+ ions on the surface of SiO2 through the formation of coordination compounds with surface hydroxyls and H2O molecules as ligands. Thermal reduction of the Mn/SiO2 catalyst resulted in the migration and accumulation of the Mn2+ ions. The results of TPR, IR, XPS were consistent with those of EPR, which indicated that on a Rh-Mn/SiO2 catalyst, a Rh-Mn mixed oxide was formed, which stabilized the Rh+ species. The formation of small clusters of the Rh-Mn mixed oxide inhibited deep reduction and accumulation of the Mn component, while at the same time increased the dispersion of the Rh component. As a promoter, Mn acts as an electron acceptor, while Li exhibits an electron-donation effect. The Li component can inhibit the formation of Rh-Mn mixed oxide and increase the concentration of Rh-0 on the surface of SiO2. The existence of Li may also cause the tilted-adsorption form of CO on Rh, as well as the spillover of H-2 from Rh to the SiO2 support. (C) 1999 Elsevier Science B.V. All rights reserved.
Language英语
WOS IDWOS:000084148900006
Citation statistics
Cited Times:47[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138210
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y,Song, Z,Ma, D,et al. Characterization of Rh-based catalysts with EPR, TPR, IR and XPS[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,1999,149(1-2):51-61.
APA Wang, Y,Song, Z,Ma, D,Luo, HY,Liang, DB,&Bao, XH.(1999).Characterization of Rh-based catalysts with EPR, TPR, IR and XPS.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,149(1-2),51-61.
MLA Wang, Y,et al."Characterization of Rh-based catalysts with EPR, TPR, IR and XPS".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 149.1-2(1999):51-61.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Y]'s Articles
[Song, Z]'s Articles
[Ma, D]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Y]'s Articles
[Song, Z]'s Articles
[Ma, D]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Y]'s Articles
[Song, Z]'s Articles
[Ma, D]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.