Eco-friendly electrodeposition sensing of hydrogen peroxide based on Co@Ag/PPy bimetallic nanohybrid

• Published in: Polymer bulletin (Berlin, Germany) Vol. 81; no. 17; pp. 16021 - 16042
• Main Authors: Lamiri, Leila, Belgherbi, Ouafia, Tounsi, Assia, Fellah, Mamoun, Atef, Chibani, Sayah, Abdelfetteh, Boumaza, Noureddine, Boudour, Samah, Hamza, Khemliche, Saeed, Mohammad Alam, Avramov, Pavel. V., El-Hiti, Gamal A.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2024; Springer Nature B.V
• Subjects: Bimetals; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Cobalt; Complex Fluids and Microfluidics; Composite materials; Composition; Efficiency; Electrical measurement; Electrochemical analysis; Electrochemical fabrication; Electrochemical impedance spectroscopy; Electrodeposition; Electrodes; Electrolytes; Environmental protection; Enzymes; Hydrogen peroxide; Indium tin oxides; Methods; Nanocomposites; Organic Chemistry; Original Paper; Oxidation; Physical Chemistry; Polymer Sciences; Polymerization; Polymers; Polypyrroles; Reproducibility; Scanning electron microscopy; Sensors; Silver; Soft and Granular Matter; Software; Voltammetry; Hydrogen peroxide; Electrochemical sensor; Cobalt nanoparticles; Polypyrrole; Silver nanoparticles
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-024-05457-w

Hydrogen peroxide (H 2 O 2 ) has practical applications in healthcare, food security, and environmental protection. The current study has been focused on creating H 2 O 2 sensors using a bimetallic composition of polypyrrole/Cobalt-silver on indium tin oxide (ITO) through electrochemical fabrication. Composite hybrid materials comprising Co@Ag/PPy/ITO were successfully synthesized using chronoamperometry and pulsed electrodeposition techniques. The obtained electrode (Co@Ag/PPy/ITO) was studied using scanning electron microscopy (SEM), ultraviolet–visible, and cyclic voltammetry techniques. The energy-dispersive X-ray spectroscopy and SEM revealed that silver and cobalt nanoparticles were distributed on the PPy surface, forming fern-like structures. A detailed investigation of the electrochemical properties of the bimetallic composition was conducted using cyclic voltammetry (CV), chronoamperometry, and electrochemical impedance spectroscopy. The amperometric method and CV were used to carry out the electrochemical detection of H 2 O 2 . The non-enzymatic H 2 O 2 sensor exhibited an enhanced amperometry response, showing a higher sensitivity of 3.664 mA mM −1  cm −2 within a linear range spanning 0.12–2.36 mM. Notably, the sensor achieved a low detection limit of 1.985 μM (S/N = 3). Additionally, the nanocomposite hybrids demonstrated superior stability, repeatability, and reproducibility, making this sensor suitable for long-term use.