Dynamic Atom Clusters on AuCu Nanoparticle Surface during CO Oxidation
2020-02-26
发表期刊JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN0002-7863
EISSN1520-5126
卷号142期号:8页码:4022-4027
发表状态已发表
DOI10.1021/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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