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学科主题物理化学
Growth and characterization of Au, Ni and Au-Ni nanoclusters on 6H-SiC(0001) carbon nanomesh
Wang, Zhou-jun; Fu, Qiang; Wang, Zhen; Bao, Xinhe; Fu Q(傅强); Bao XH(包信和)
关键词Gold Nickel Silicon Carbide Nucleation Thermal Stability Bimetallic Catalyst
刊名SURFACE SCIENCE
2012-08-01
DOI10.1016/j.susc.2012.04.017
606期:15-16页:1313-1322
收录类别SCI
文章类型Article
部门归属5
项目归属502
产权排名1,1
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Chemistry, Physical ; Physics, Condensed Matter
研究领域[WOS]Chemistry ; Physics
关键词[WOS]CO OXIDATION ; SURFACE ALLOY ; NANOPARTICLE CATALYSTS ; BIMETALLIC CATALYSTS ; CLUSTERS ; ADSORPTION ; REACTIVITY ; AU(111) ; SUPPORT ; FILMS
英文摘要The nucleation and thermal stability of Au. Ni, and Au-Ni nanoclusters on 6H-SiC(0001) carbon nanomesh as well as the interaction between Au-Ni bimetallic clusters and reactive gases have been studied by X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). Both Au and Ni atoms grow as three-dimensional (3D) clusters. Annealing the Au/carbon nanomesh surface up to 1150 degrees C leads to complete desorption of the Au clusters, while interfacial reaction occurs between Ni clusters and the substrate surface when the Ni clusters are subjected to the same annealing process. The nucleation of Au-Ni clusters depends critically on the deposition sequence. Au atoms preferentially nucleate on the existing Ni clusters, leading to the formation of bimetallic clusters with Au enriched on the surface. If the deposition sequence is reversed, a part of Ni atoms nucleate between the Au clusters. The thermal stability of the Au-Ni clusters resembles that of the Ni/carbon nanomesh surface, irrespective of the deposition sequence. XPS characterization reveals that Ni atoms in Au-Ni bimetallic clusters are oxidized upon exposure to 5.0 x 10(-7) mbar O-2 for 5 min at room temperature while negligible structure change can be detected when the bimetallic clusters are exposed to CO gas under the similar conditions. (C) 2012 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000305845600033
引用统计
被引频次:11[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/117830
专题中国科学院大连化学物理研究所
通讯作者Fu Q(傅强); Bao XH(包信和)
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
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GB/T 7714
Wang, Zhou-jun,Fu, Qiang,Wang, Zhen,et al. Growth and characterization of Au, Ni and Au-Ni nanoclusters on 6H-SiC(0001) carbon nanomesh[J]. SURFACE SCIENCE,2012,606(15-16):1313-1322.
APA Wang, Zhou-jun,Fu, Qiang,Wang, Zhen,Bao, Xinhe,傅强,&包信和.(2012).Growth and characterization of Au, Ni and Au-Ni nanoclusters on 6H-SiC(0001) carbon nanomesh.SURFACE SCIENCE,606(15-16),1313-1322.
MLA Wang, Zhou-jun,et al."Growth and characterization of Au, Ni and Au-Ni nanoclusters on 6H-SiC(0001) carbon nanomesh".SURFACE SCIENCE 606.15-16(2012):1313-1322.
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