DICP OpenIR
Subject Area物理化学
In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts
Lin, Jian1,2; Li, Lin1; Huang, Yanqiang1; Zhang, Wansheng1; Wang, Xiaodong1; Wang, Aiqin1; Zhang, Tao1; Wang XD(王晓东); Zhang T(张涛)
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2011-08-25
ISSN待补充
DOI10.1021/jp204288h
Volume115Issue:33Pages:16509-16517
Indexed BySCI
SubtypeArticle
Department15
Funding Project1501
Contribution Rank1,1
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordWATER-GAS-SHIFT ; SUPPORTED GOLD CATALYSTS ; PROBING DEFECT SITES ; CARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; OXYGEN VACANCIES ; PT/CEO2 CATALYST ; O-2 ADSORPTION ; ACTIVE-SITES ; CERIA
AbstractIn situ calorimetric study: structural effects on adsorption and catalytic performances for CO oxidation over Ir-in-CeO2 and Ir-on-CeO2 catalysts; 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.
Language英语
WOS IDWOS:000294077000034
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115793
Collection中国科学院大连化学物理研究所
Corresponding AuthorWang XD(王晓东); Zhang T(张涛)
Affiliation1.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
GB/T 7714
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.
APA Lin, Jian.,Li, Lin.,Huang, Yanqiang.,Zhang, Wansheng.,Wang, Xiaodong.,...&张涛.(2011).In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts.JOURNAL OF PHYSICAL CHEMISTRY C,115(33),16509-16517.
MLA Lin, Jian,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".JOURNAL OF PHYSICAL CHEMISTRY C 115.33(2011):16509-16517.
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