DICP OpenIR
Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation
Li, Weili1,4; Ge, Qingjie1; Ma, Xiangang1; Chen, Yuxiang2; Zhu, Manzhou3; Xu, Hengyong1; Jin, Rongchao2
Source PublicationNANOSCALE
2016
ISSN2040-3364
DOI10.1039/c5nr07498c
Volume8Issue:4Pages:2378-2385
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordSUPPORTED AU CATALYSTS ; PROBING DEFECT SITES ; GAS SHIFT REACTION ; CLUSTERS ; AU-25 ; CEO2 ; OXYGEN ; NANOPARTICLES ; NANORODS ; SURFACE
AbstractWe report a new activation method and insight into the catalytic behavior of a CeO2-supported, atomically precise Au-144(SR)(60) nanocluster catalyst (where thiolate -SR = -SCH2CH2Ph) for CO oxidation. An important finding is that the activation of the catalyst is closely related to the production of active oxygen species on CeO2, rather than ligand removal of the Au-144(SR)(60) clusters. A mild O-2 pretreatment (at 80 degrees C) can activate the catalyst, and the addition of reductive gases (CO or H-2) can enhance the activation effects of O-2 pretreatment via a redox cycle in which CO could reduce the surface of CeO2 to produce oxygen vacancies-which then adsorb and activate O-2 to produce more active oxygen species. The CO/O-2 pulse experiments confirm that CO is adsorbed on the cluster catalyst even with ligands on, and active oxygen species present on the surface of the pretreated catalyst reacts with CO pulses to generate CO2. The Au-144(SR)(60)/CeO2 exhibits high CO oxidation activity at 80 degrees C without the removal of thiolate ligands. The surface lattice-oxygen of the support CeO2 possibly participates in the oxidation of CO over the Au-144(SR)(60)/CeO2 catalyst.
Language英语
WOS IDWOS:000368860900073
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/171331
Collection中国科学院大连化学物理研究所
Corresponding AuthorGe, Qingjie; Jin, Rongchao
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Carnegie Mellon Univ, Dept Chem, 4400 5th Ave, Pittsburgh, PA 15213 USA
3.Anhui Univ, Dept Chem, Hefei 230026, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Weili,Ge, Qingjie,Ma, Xiangang,et al. Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation[J]. NANOSCALE,2016,8(4):2378-2385.
APA Li, Weili.,Ge, Qingjie.,Ma, Xiangang.,Chen, Yuxiang.,Zhu, Manzhou.,...&Jin, Rongchao.(2016).Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation.NANOSCALE,8(4),2378-2385.
MLA Li, Weili,et al."Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation".NANOSCALE 8.4(2016):2378-2385.
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