Abstract
In this work, we report for the first time a one-step electrochemical deposition of gold−Prussian blue (PB) nanocomposite films. The catalytic activity of gold nuclei toward the decomposition of ferricyanide to free ferric ions and controlled generation of gold nanoparticles from HAuCl4 solutions during potential cycling are exploited to form these nanocomposites. Concomitant electrochemical formation of both PB and gold phases leads to a “perfect blend”, in which each phase controls the growth of the other. The mechanism of formation and the features that distinguish this approach from others are highlighted. The nanocomposite films were characterized using voltammetry and UV−vis spectroscopy, field emission scanning electron microscopy (FE-SEM), and atomic force microscopy (AFM). Interestingly, reversibility of the redox conversions of PB is enhanced by the presence of Au nanoparticles, as indicated by the reduced ΔEp value in cyclic voltammetry and low charge-transfer resistance in ac impedance spectro...
Published Version
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