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学科主题物理化学
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)
刊名JOURNAL OF PHYSICAL CHEMISTRY C
2011-08-25
ISSN待补充
DOI10.1021/jp204288h
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
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science
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
英文摘要In situ calorimetric study: structural effects on adsorption and catalytic performances for CO oxidation over Ir-in-CeO2 and Ir-on-CeO2 catalysts; 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.
语种英语
WOS记录号WOS:000294077000034
引用统计
被引频次:39[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115793
专题中国科学院大连化学物理研究所
通讯作者Wang XD(王晓东); Zhang T(张涛)
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
推荐引用方式
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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