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
学科主题: 物理化学
题名: In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts
作者: Lin, Jian1, 2;  Li, Lin1;  Huang, Yanqiang1;  Zhang, Wansheng1;  Wang, Xiaodong1;  Wang, Aiqin1;  Zhang, Tao1
通讯作者: 王晓东 ;  张涛
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2011-08-25
DOI: 10.1021/jp204288h
卷: 115, 期:33, 页:16509-16517
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
摘要: In situ calorimetric study: structural effects on adsorption and catalytic performances for CO oxidation over Ir-in-CeO2 and Ir-on-CeO2 catalysts
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: In this study, the formation processes of CO2 and carbonates during CO oxidation over Ir-in-CeO2 and Ir-on-CeO2 catalysts at 40 degrees C were compared. An in situ pulse calorimetry, in combination with H-2-TPR, Raman, DRIFTS, and adsorption microcalorimetry techniques, was used to reveal the effect of structural differences of these two catalysts on the adsorption and catalytic performances for CO oxidation. It was found that encapsulating Ir in CeO2 greatly weakened the Ce-O bond strength on Ir-in-CeO2. This led to the formation of more oxygen vacancy sites, promoting the accumulation of carbonates. Comparatively, supporting Ir on CeO2 showed a higher Ce-O bond strength and less oxygen vacancy sites on Ir-on-CeO2 but exposed more surface accessible Ir sites, which favored the CO adsorption. During CO oxidation, more oxygen vacancy sites on Ir-in-CeO2 resulted in the formation of carbonates with 0.06 monolayers coverage initially before the production of CO2, whereas surface Ir sites on Ir-on-CeO2 facilitated the adsorbed CO reacting with the oxygen species to directly produce CO2.
关键词[WOS]: WATER-GAS-SHIFT ;  SUPPORTED GOLD CATALYSTS ;  PROBING DEFECT SITES ;  CARBON-MONOXIDE ;  PREFERENTIAL OXIDATION ;  OXYGEN VACANCIES ;  PT/CEO2 CATALYST ;  O-2 ADSORPTION ;  ACTIVE-SITES ;  CERIA
语种: 英语
WOS记录号: WOS:000294077000034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115793
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: Download All
File Name/ File Size Content Type Version Access License
2011hlM73LoBmr.pdf(1537KB)----开放获取--View Download

作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Lin, Jian,Li, Lin,Huang, Yanqiang,et al. In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(33):16509-16517.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Lin, Jian]'s Articles
 [Li, Lin]'s Articles
 [Huang, Yanqiang]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Lin, Jian]‘s Articles
 [Li, Lin]‘s Articles
 [Huang, Yanqiang]‘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 
文件名: 2011hlM73LoBmr.pdf
格式: Adobe PDF
此文件暂不支持浏览
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