中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Characterization of Rh-based catalysts with EPR, TPR, IR and XPS
作者: Wang, Y;  Song, Z;  Ma, D;  Luo, HY;  Liang, DB;  Bao, XH
关键词: characterization ;  Rh ;  catalyst ;  EPR ;  TPR ;  IR ;  XPS
刊名: JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
发表日期: 1999-12-15
卷: 149, 期:1-2, 页:51-61
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Rh-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.
关键词[WOS]: SUPPORTED RHODIUM CATALYSTS ;  CO HYDROGENATION ;  PROMOTED RHODIUM ;  SYNGAS ;  ACETALDEHYDE ;  MANGANESE ;  PRESSURE ;  RHMN/NAY ;  MN
语种: 英语
WOS记录号: WOS:000084148900006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138210
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
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.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Wang, Y]'s Articles
 [Song, Z]'s Articles
 [Ma, D]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Wang, Y]‘s Articles
 [Song, Z]‘s Articles
 [Ma, D]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Powered by CSpace