In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts

	In Situ Calorimetric Study: Structural Effects on Adsorption and Catalytic Performances for CO Oxidation over Ir-in-CeO2 and Ir-on-CeO2 Catalysts
	Lin, Jian 1,2; Li, Lin 1; Huang, Yanqiang 1; Zhang, Wansheng 1; Wang, Xiaodong 1; Wang, Aiqin 1; Zhang, Tao 1
刊名	journal of physical chemistry c
	2011-08-25
卷号	115 期号:33 页码:16509-16517
ISSN号	待补充
通讯作者	王晓东 ; 张涛
产权排序	1,1
中文摘要	in situ calorimetric study: structural effects on adsorption and catalytic performances for co oxidation over ir-in-ceo2 and ir-on-ceo2 catalysts
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.
学科主题	物理化学
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000294077000034
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115793]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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.,...&Zhang, Tao.(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.