INOR 602 |
| The utilization of vertically aligned nanoporous gold nanorod arrays as templates for generating ultrathin Pt-coating on the surface of such structures displaying electrocatalytically active large surface area is described. The use of gold as a backbone offers several advantages such as easy formation of porous structures from selective dissolution of less noble component. The resulting nanoporous gold nanorod arrays enable the deposition of ultrathin overlayer through copper under-potential-deposition (UPD), followed by spontaneous replacement with more noble Pt-group metal ions. Epitaxial Pt-coating down to 1~2 monolayer level can be prepared by the spontaneous replacement of an electrochemically deposited copper layer by the Pt metal. Experimental results showing homogeneous Pt-coating inside of nanopores of gold nanorods were obtained from electrochemical analysis and scanning electron microscopy images. The potential of the present strategy for synthesizing Pt-coated nanoporous nanorod arrays and their catalytic application is pointed out. |
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Inorganic Electrochemistry
7:00 PM-10:00 PM, Tuesday, August 21, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Inorganic Chemistry |