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- W2076694516 abstract "Abstract In this work we demonstrate the preparation of highly catalytically active Pt formed by the galvanic replacement of the copper adlayer on Au substrates, modified by the self-assembly of fourth generation amine terminated PAMAM dendrimer (G4NH2). The copper adlayer was formed on the dendrimer-modified gold substrate by chemical preconcentration of copper ions followed by electrochemical reduction. The Pt overlayer was characterized by SEM, XPS and by cyclic voltammetry. The catalytic efficiency of the modified film thus prepared through soft route was evaluated by the electro catalytic oxidation of methanol using cyclic voltammetry, chronoamperometry and AC impedance techniques. This work also demonstrates that the copper adlayer formed on the dendrimer-modified electrode can undergo galvanic replacement by nobler metals like Au and Ag, besides Pt. An elegant soft route involving a new three-step protocol to build the concentration of active Pt on the Au surface has been developed. Concentration of the same metal (Pt) or two different metals (Pt–Au) can be built at the interface in a stepwise manner at ambient temperature." @default.
- W2076694516 created "2016-06-24" @default.
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- W2076694516 date "2009-05-01" @default.
- W2076694516 modified "2023-09-27" @default.
- W2076694516 title "Preparation of catalytic films of platinum on Au substrates modified by self-assembled PAMAM dendrimer monolayers" @default.
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- W2076694516 doi "https://doi.org/10.1016/j.apcatb.2008.10.003" @default.
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