Gold Particles Deposited on Electrodes in Salt Solutions under Different Potentials

DOI Web Site 被引用文献3件
  • Da-Ling Lu
    The Institute for Solid State Physics, The University of Tokyo, 7-22-1, Roppongi, Minato-ku, Tokyo 106, Japan
  • Ken-ichi Tanaka
    The Institute for Solid State Physics, The University of Tokyo, 7-22-1, Roppongi, Minato-ku, Tokyo 106, Japan

書誌事項

公開日
1996-01-01
DOI
  • 10.1021/jp952183v
公開者
American Chemical Society (ACS)

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説明

The crystal habit of gold particles formed on an amorphous carbon film at different electrode potentials in salt solutions was studied by means of transmission electron microscopy. It was found that the results of this experiment are consistent with the results of our previous experiments using acid solutions. That is, the gold particles grown at negative electrode potentials vs SCE are mainly decahedral and icosahedral, while the particles formed at positive electrode potentials vs SCE are normal fcc octahedral particles and polycrystalline particles. As the surface energy of the hexagonal structure is lower than that of the (1×1) structure under negative electrode potentials (SCE), the shape of fine gold particles is influenced by the negative electrode potential. We also found an interesting phenomenon of agglomeration of the gold particles at electrode potentials more negative than that of hydrogen evolution.

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