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学科主题: 物理化学
题名: Microkinetic Study of CO Oxidation and PROX on Ir-Fe Catalyst
作者: Liu, Kuo2, 3;  Wang, Aiqin2;  Zhang, Wansheng2;  Wang, Junhu2;  Huang, Yanqiang2;  Wang, Xiaodong2;  Shen, Jianyi1;  Zhang, Tao2
通讯作者: 张涛 ;  沈俭一
刊名: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
发表日期: 2011-01-19
DOI: 10.1021/ie1009052
卷: 50, 期:2, 页:758-766
收录类别: SCI ;  ISTP
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 ;  Technology
类目[WOS]: Engineering, Chemical
摘要: Microkinetic Study of CO Oxidation and PROX on Ir-Fe Catalyst
研究领域[WOS]: Engineering
英文摘要: A microkinetic analysis of the preferential oxidation of CO in H(2) over Ir-Fe/SiO(2) catalyst is reported. Based on the results of in situ diffuse reflectance infrared spectroscopy, microcalorimetry, Mossbauer spectroscopy, and steady-state kinetic experiments in a microreactor, a microkinetic model is proposed that predicts the experimental results well. The model suggests that the reaction between adsorbed H and O for the formation of OH is rate-limiting for the PROX reaction, whereas the surface reaction between adsorbed CO and O is rate-determining for CO oxidation. In addition, the model predicts that the oxidation of adsorbed CO by surface OH is the dominant pathway for the PROX reaction. The surface coverages of different intermediates are also predicted by the model. According to this model, we can conclude that the presence of H(2) increases the surface concentration of OH and, hence, lowers the activation energy and increases the rate of the PROX reaction.
关键词[WOS]: WATER-GAS SHIFT ;  FUEL-CELL APPLICATIONS ;  PREFERENTIAL OXIDATION ;  REACTION-MECHANISM ;  HETEROGENEOUS CATALYSIS ;  SELECTIVE OXIDATION ;  REACTION PARAMETERS ;  CARBON-MONOXIDE ;  H-2 OXIDATION ;  H-2-RICH GAS
语种: 英语
WOS记录号: WOS:000286027900036
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115815
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Nanjing Univ, Dept Chem, Nanjing 210093, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Liu, Kuo,Wang, Aiqin,Zhang, Wansheng,et al. Microkinetic Study of CO Oxidation and PROX on Ir-Fe Catalyst[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2011,50(2):758-766.
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