Electrochemical fabrication of polyproline modified graphite electrode decorated with Pd-Au bimetallic nanoparticles: Application for determination of carminic acid


Arslan E., Cakir S.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, vol.760, pp.32-41, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 760
  • Publication Date: 2016
  • Doi Number: 10.1016/j.jelechem.2015.11.042
  • Journal Name: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.32-41
  • Keywords: Modified graphite electrode, Polyproline, Palladium-gold bimetallic nanoparticles, Electrodeposition, Carminic acid, GLASSY-CARBON ELECTRODES, ELECTROCATALYTIC PROPERTIES, PALLADIUM NANOPARTICLES, FUNCTIONALIZED GRAPHENE, GOLD NANOPARTICLES, INITIAL-STAGES, ASCORBIC-ACID, FORMIC-ACID, CORE-SHELL, PT-PD
  • Gazi University Affiliated: Yes

Abstract

A novel modified electrode has been developed, by electrodeposition of Pd-Au bimetallic nanoparticles (Pd-AuNps) on a polypyroline coated (Poly(Pr)) graphite electrode (GE). The structure and morphologies of Pd-AuNps/Poly(Pr)/GE were characterized by cyclic voltammetry (CV), square wave voltammetry (SWV), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photon spectroscopy (XPS) techniques. The electrocatalytic activities and morphologies of the new electrode were compared with individual monometallic AuNps/PoIy(Pr)/GE and PdNps/Poly(Pr)/GE. This new bimetallic nanoparticle modified electrode (Pd-AuNps/Poly(Pr)/GE) was evaluated for determination of carminic acid. The oxidation peak (0.750 V) of carminic acid was found to be linearly related to carminic acid concentration in the range of 1.0 x 10(-8) to 1.0 x 10(-6) M with a detection limit of 5.90 x 10(-9) M. The proposed method was simple, less time consuming and showed a high sensitivity. (C) 2015 Elsevier B.V. All rights reserved.