Direct deposition of nanostructured Pt particles onto a Ni foam from lyotropic liquid crystalline phase by displacement plating

Nanostructured Pt particles are directly deposited onto a Ni foam by utilizing displacement plating after a lyotropic liquid crystalline phase including Pt species was prepared within macropores of the Ni foam. The EDS mapping of Pt after deposition corresponds to the macroscopic framework of the Ni...

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Bibliographic Details
Published in:Electrochimica acta 2007-12, Vol.53 (2), p.604-609
Main Authors: Yamauchi, Yusuke, Komatsu, Masaki, Takai, Azusa, Sebata, Ryusuke, Sawada, Makoto, Momma, Toshiyuki, Fuziwara, Minekazu, Osaka, Tetsuya, Kuroda, Kazuyuki
Format: Article
Language:English
Subjects:
Chemistry
Displacement plating
Electrocatalyst
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Nanostructured metal
Ni foam
Other electrodes
Platinum
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Summary:Nanostructured Pt particles are directly deposited onto a Ni foam by utilizing displacement plating after a lyotropic liquid crystalline phase including Pt species was prepared within macropores of the Ni foam. The EDS mapping of Pt after deposition corresponds to the macroscopic framework of the Ni foam, indicating the uniform displacement plating of Pt on the surface of the Ni foam. The Pt particles of 150–250 nm in size are formed over the entire area of the surface of the Ni foam. The TEM images prove that the nanoscale rods (width: about 3 nm) are aggregated with each other to form nanoscale porosity. The active area of Pt can be estimated to be ca. 12 m 2/g by using the cyclic voltammogram in sulfuric acid. Our method realizes one-step production of hierarchical macro–meso type porous electrodes.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2007.07.036