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dc.contributor.authorHan-Chun Wang
dc.contributor.authorShi-Gang Sun
dc.contributor.author孙世刚
dc.contributor.authorJia-Wei Yan
dc.contributor.author颜佳伟
dc.contributor.authorHong-Zhou Yang
dc.contributor.authorZhi-You Zhou
dc.contributor.author周志有
dc.date.accessioned2011-11-25T01:28:33Z
dc.date.available2011-11-25T01:28:33Z
dc.date.issued2005-02
dc.identifier.citationJ. Phys. Chem. B, 2005, 109 (10): 4309–4316zh_CN
dc.identifier.issn1520-6106
dc.identifier.urihttp://dx.doi.org/doi:10.1021/jp046313o
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/11239
dc.description.abstractWe have extended the study of anomalous IR properties, which were initially discovered on nanostructured films of platinum group metals and alloys, to nanostructured films of nickel, a member of the iron group triad, and broadened the fundamental knowledge on this subject. Nanostructured thin films of nickel supported on glassy carbon [nm-Ni/GC(n)] were prepared by electrochemical deposition under cyclic voltammetric conditions, and the thickness of films was altered systematically by varying the number (it) of potential cycling within a defined potential range for electrodeposition. Electrochemical in situ scanning tunneling microscopy (STM) was employed to monitor the electrochemical growth of nanostructured Ni films. These in situ STM images illustrated that, along the increase of the film thickness, Ni films have undergone a transformation from layer structure to island structure and finally to lumpish arris structure. Investigations by in situ FTIR spectroscopy employing adsorbed CO as the probe revealed that these nanostructures of Ni films yield abnormal IR features, Fano-like IR features, and normal IR features, respectively. The IR bands of CO adsorbed on Ni thin films of a layer structure were inverted in their direction and enhanced in their intensity up to 15.5 times on an nm-Ni/GC(4) electrode. The Fano-like IR features, which are defined as a bipolar band with its negative-going peak on the low wavenumber side and its positive-going peak on the high wavenumber side, are observed for the first time on Ni thin films of an island nanostructure, i.e., at the nm-Ni/GC(16) electrode. IR features changed to normal absorption in CO adsorbed on the nm-Ni/GC(25) electrode, i.e., that with lumpish arris nanostructured Ni film of a larger thickness.zh_CN
dc.language.isoenzh_CN
dc.publisherAMER CHEMICAL SOCzh_CN
dc.titleIn situ STM studies of electrochemical growth of nanostructured Ni films and their anomalous IR propertieszh_CN
dc.typeArticlezh_CN


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