DICP OpenIR
Subject Area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)
KeywordGold Nickel Silicon Carbide Nucleation Thermal Stability Bimetallic Catalyst
Source PublicationSURFACE SCIENCE
2012-08-01
DOI10.1016/j.susc.2012.04.017
Volume606Issue:15-16Pages:1313-1322
Indexed BySCI
SubtypeArticle
Department5
Funding Project502
Contribution Rank1,1
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical ; Physics, Condensed Matter
WOS Research AreaChemistry ; Physics
WOS KeywordCO OXIDATION ; SURFACE ALLOY ; NANOPARTICLE CATALYSTS ; BIMETALLIC CATALYSTS ; CLUSTERS ; ADSORPTION ; REACTIVITY ; AU(111) ; SUPPORT ; FILMS
AbstractThe 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.
Language英语
WOS IDWOS:000305845600033
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/117830
Collection中国科学院大连化学物理研究所
Corresponding AuthorFu Q(傅强); Bao XH(包信和)
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
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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