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Size-dependent surface reactions of Ag nanoparticles supported on highly oriented pyrolytic graphite
Zhang, Hui; Fu, Qiang; Yao, Yunxi; Zhang, Zhen; Ma, Teng; Tan, Dali; Bao, Xinhe
刊名LANGMUIR
2008-10-07
DOI10.1021/la801348n
24期:19页:10874-10878
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Materials Science
关键词[WOS]CHARGE-TRANSFER PHOTODISSOCIATION ; CATALYTICALLY ACTIVE GOLD ; OXYGEN-ADSORPTION ; EPOXIDE FORMATION ; SILVER CATALYSTS ; ETHYLENE-OXIDE ; OXIDATION ; CLUSTERS ; AG(110) ; XPS
英文摘要Various sizes of Ag particles were grown on highly oriented pyrolytic graphite (HOPG) surfaces, which had previously been modified with nanopits to act as anchoring sites. Surface reactions of O-2, CHCl3, and CCl4 on the Ag particles and bulk Ag(111) surfaces were studied by X-ray photoelectron spectroscopy (XPS), and it has been shown that size dependence of O-2 and CHCl3 reactions on Ag differs from that of CCl4. Weak reactions of O-2 and CHCl3 were observed on the bulk Ag(111) surfaces, while strong reactions occur on Ag particles with medium Ag coverage, suggesting that the reactions are controlled by the number of surface defect sites. On the contrary, the dissociation of CCl4 is mainly determined by the exposed Ag facet area, mainly Ag(111) facet, and strong dissociation reaction happens on the bulk Ag(111) surface. The results suggest that the size effects, which are often discussed in heterogeneous catalysis, are strongly dependent on the reaction mechanism.
语种英语
WOS记录号WOS:000259673500055
引用统计
被引频次:37[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/321008/141077
专题中国科学院大连化学物理研究所
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
Zhang, Hui,Fu, Qiang,Yao, Yunxi,et al. Size-dependent surface reactions of Ag nanoparticles supported on highly oriented pyrolytic graphite[J]. LANGMUIR,2008,24(19):10874-10878.
APA Zhang, Hui.,Fu, Qiang.,Yao, Yunxi.,Zhang, Zhen.,Ma, Teng.,...&Bao, Xinhe.(2008).Size-dependent surface reactions of Ag nanoparticles supported on highly oriented pyrolytic graphite.LANGMUIR,24(19),10874-10878.
MLA Zhang, Hui,et al."Size-dependent surface reactions of Ag nanoparticles supported on highly oriented pyrolytic graphite".LANGMUIR 24.19(2008):10874-10878.
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