Investigation of electrochemical behavior of potassium ferricyanide/ferrocyanide redox probes on screen printed carbon electrode through cyclic voltammetry and electrochemical impedance spectroscopy

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Koç Y., Moralı U., Erol S., Avcı H.

Turkish Journal Of Chemistry, cilt.45, sa.6, ss.1895-1915, 2021 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 45 Sayı: 6
  • Basım Tarihi: 2021
  • Doi Numarası: 10.3906/kim-2105-55
  • Dergi Adı: Turkish Journal Of Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.1895-1915
  • Anahtar Kelimeler: Electrochemical impedance spectroscopy, cyclic voltammetry, screen printed carbon electrode, ferricyanide-ferrocyanide redox probe, equivalent circuit modeling, PASTE ELECTRODE, GOLD ELECTRODES, FERRICYANIDE, PERFORMANCE, DOPAMINE, SPECTRA
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Potassium ferricyanide, potassium ferrocyanide and their combination system are widely used redox probes for electrochemical impedance spectroscopy (EIS) characterization. In this work, electrochemical behavior of K3Fe(CN)6, K4Fe(CN)6, and K3Fe(CN)6/K4Fe(CN)6 redox probes at five different concentrations using a screen printed carbon electrode (SPCE) by cyclic voltammetry (CV) and EIS methods was analyzed. Redox potentials were observed as a result of anodic and cathodic peak with CV analysis with determination 10 mM appropriate concentration through 0.01 mM, 0.1 mM, 1 mM, and 100 mM. In addition, with EIS analysis, each redox probe was simulated according to two different Randles circuit models and fitting equivalent model with varying concentration was determined and examined in detail. The results also demonstrated that selected high and low concentrations of redox probes can be categorized in two different models although 1 mM behaved as a critical transition concentration. It is expected, this study may contribute to the determination of relevant redox probe and its concentration in electrochemical investigations by selecting K3Fe(CN)6/K4Fe(CN)6 to decrease any risk of inaccuracy.