A novel palladium nanoparticles-polyproline-modified graphite electrode and its application for determination of curcumin


A novel-modified electrode has been developed, by electrodeposition of palladium nanoparticles (PdNps) on polypyroline film-coated (Poly(Pr)) graphite electrode. The modified electrode (PdNps/Poly(Pr)/GE) was characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) techniques. SEM proved that the palladium nanoparticles were uniform distributed with an average particle diameter of 20–45 nm. A higher catalytic activity was obtained for curcumin oxidation using this new modified electrode (PdNps/Poly(Pr)/GE). The square wave voltammogram of curcumin in pH 2 phosphate buffer exhibited an anodic peak at 0.504 V. This oxidation peak current was found to be linearly related to curcumin concentrations in the ranges of 5.0 × 10−9 to 1.0 × 10−7 M with a detection limit of 1.2 × 10−9 M. This novel-modified electrode showed excellent sensitivity, compared with the existing reports about determination of curcumin.

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The authors are grateful for the financial support of Gazi University Scientific Research Projects Unit (project no. 05/2012-28).

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Correspondence to Semiha Çakır.

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Arslan, E., Çakır, S. A novel palladium nanoparticles-polyproline-modified graphite electrode and its application for determination of curcumin. J Solid State Electrochem 18, 1611–1620 (2014). https://doi.org/10.1007/s10008-014-2382-6

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  • Modified electrode
  • Polyproline
  • Palladium nanoparticles
  • Electrodeposition
  • Curcumin