Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation
文献类型：期刊论文
| 作者 | Chen, Yuxiang1; Ma, Xiangang3; Xu, Hengyong3; Li, Weili2,3; Zhu, Manzhou4; Ge, Qingjie3; Jin, Rongchao1 |
| 刊名 | NANOSCALE
 |
| 出版日期 | 2016 |
| 卷号 | 8期号:4页码:2378-2385 |
| ISSN号 | 2040-3364 |
| DOI | 10.1039/c5nr07498c |
| 文献子类 | Article |
| 英文摘要 | We 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. |
| WOS关键词 | SUPPORTED AU CATALYSTS ; PROBING DEFECT SITES ; GAS SHIFT REACTION ; CLUSTERS ; AU-25 ; CEO2 ; OXYGEN ; NANOPARTICLES ; NANORODS ; SURFACE |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000368860900073 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171330]  |
| 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 |
| 通讯作者 | Ge, Qingjie; Jin, Rongchao |
| 作者单位 | 1.Carnegie Mellon Univ, Dept Chem, 4400 5th Ave, Pittsburgh, PA 15213 USA 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 4.Anhui Univ, Dept Chem, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yuxiang,Ma, Xiangang,Xu, Hengyong,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 | Chen, Yuxiang.,Ma, Xiangang.,Xu, Hengyong.,Li, Weili.,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 | Chen, Yuxiang,et al."Mild activation of CeO2-supported gold nanoclusters and insight into the catalytic behavior in CO oxidation".NANOSCALE 8.4(2016):2378-2385. |
入库方式： OAI收割
来源：大连化学物理研究所
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