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题名: More Active Ir Subnanometer Clusters than Single-Atoms for Catalytic Oxidation of CO at Low Temperature
作者: Lin, Jian1;  Chen, Yang1, 2;  Zhou, Yanliang1, 2;  Li, Lin1;  Qiao, Botao1;  Wang, Aiqin1;  Liu, Jingyue3;  Wang, Xiaodong1;  Zhang, Tao1
关键词: CO oxidation ;  CO2 ;  Ir ;  subnanometer clusters ;  single atoms
刊名: AICHE JOURNAL
发表日期: 2017-09-01
DOI: 10.1002/aic.15756
卷: 63, 期:9, 页:4003-4012
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: This work reported the adsorption and reaction performance of FeOx supported subnanometer cluster and single-atom Ir catalysts for the oxidation of CO at low temperature. By varying the pretreatment temperature and Ir loading, the single-atom and subnanometer cluster Ir catalysts were obtained. The Ir subnanometer clusters exhibited higher activity for the oxidation of CO with or without the presence of H-2 than the single-atom counterpart. By using adsorption microcalorimetry and in situ infrared spectroscopy measurements, it was found that the Ir subnanometer clusters not only promoted the adsorption and reaction of CO and O-2 but also facilitated the formation of OH species from reaction between H-2 and O-2, thus opening a new reaction pathway between CO and OH species to produce CO2 compared with that between CO and O species on the single-atom counterpart. (C) 2017 American Institute of Chemical Engineers
关键词[WOS]: WATER-GAS SHIFT ;  PREFERENTIAL OXIDATION ;  CARBON-MONOXIDE ;  ROOM-TEMPERATURE ;  OXYGEN ACTIVATION ;  OXIDE CATALYSTS ;  GOLD CATALYSTS ;  PARTICLE-SIZE ;  EXCESS H-2 ;  ADSORPTION
语种: 英语
WOS记录号: WOS:000407192500030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149814
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.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA

Recommended Citation:
Lin, Jian,Chen, Yang,Zhou, Yanliang,et al. More Active Ir Subnanometer Clusters than Single-Atoms for Catalytic Oxidation of CO at Low Temperature[J]. AICHE JOURNAL,2017,63(9):4003-4012.
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