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Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation | |
2020-02-26 | |
发表期刊 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY |
ISSN | 0002-7863 |
EISSN | 1520-5126 |
卷号 | 142期号:8页码:4022-4027 |
发表状态 | 已发表 |
DOI | 10.1021/jacs.9b13901 |
摘要 | Supported alloy nanoparticles are prevailing alternative low-cost catalysts for both heterogeneous and electrochemical catalytic processes. Gas molecules selectively interacting with one metal element induces a dynamic structural change of alloy nanoparticles under reaction conditions and largely controls their catalytic properties. However, such a multicomponent dynamic-interaction-controlled evolution, both structural and chemical, remains far from clear. Herein, by using state-of-the-art environmental TEM, we directly visualize, in situ at the atomic scale, the evolution of a AuCu alloy nanoparticle supported on CeO2 during CO oxidation. We find that gas molecules can "free" metal atoms on the (010) surface and form highly mobile atom clusters. Remarkably, we discover that CO exposure induces Au segregation and activation on the nanoparticle surface, while O-2 exposure leads to the segregation and oxidation of Cu on the particle surface. The as-formed Cu2O/AuCu interface may facilitate CO-O interaction corroborated by DFT calculations. These findings provide insights into the atomistic mechanisms on alloy nanoparticles during catalytic CO oxidation reaction and to a broad scope of rational design of alloy nanoparticle catalysts. |
收录类别 | SCI ; SCIE ; EI |
语种 | 英语 |
资助项目 | DOE[DE-AC05-76RL01830] |
WOS研究方向 | Chemistry |
WOS类目 | Chemistry, Multidisciplinary |
WOS记录号 | WOS:000517360400040 |
出版者 | AMER CHEMICAL SOC |
EI入藏号 | 20201108276328 |
EI主题词 | Atoms ; Catalytic oxidation ; Cerium alloys ; Cerium oxide ; Copper oxides ; Design for testability ; Metal nanoparticles ; Molecules ; Nanocatalysts ; Oxidation ; Segregation (metallography) ; Surface segregation |
EI分类号 | Metallography:531.2 ; Copper Alloys:544.2 ; Rare Earth Metals:547.2 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3 |
WOS关键词 | BIMETALLIC NANOPARTICLES ; SEGREGATION ; CATALYSTS ; DRIVEN ; PD ; KINETICS ; DESIGN ; GOLD |
原始文献类型 | Article |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/119049 |
专题 | 物质科学与技术学院_博士生 物质科学与技术学院_PI研究组_杨波组 |
共同第一作者 | Chen, Shuyue; Xu, Qian |
通讯作者 | Luo, Langli; Yang, Bo; Wang, Chongmin |
作者单位 | 1.Tianjin Univ, Inst Mol Plus, Dept Chem, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China 2.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China 4.Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230029, Anhui, Peoples R China 5.Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA 6.Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Washington, WA 99354 USA |
通讯作者单位 | 物质科学与技术学院 |
推荐引用方式 GB/T 7714 | Luo, Langli,Chen, Shuyue,Xu, Qian,et al. Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2020,142(8):4022-4027. |
APA | Luo, Langli.,Chen, Shuyue.,Xu, Qian.,He, Yang.,Dong, Zejian.,...&Wang, Chongmin.(2020).Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,142(8),4022-4027. |
MLA | Luo, Langli,et al."Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 142.8(2020):4022-4027. |
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