Effective Methanol Oxidation with Platinum Nanoparticles-Decorated Poly(2-bromomethyl-2-methyl-3,4-propylenedioxythiophene)-Coated Glassy Carbon Electrode


Karazehir T., Sarac B., Gilsing H., Eckert J., Sarac A. S.

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, vol.168, no.8, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 168 Issue: 8
  • Publication Date: 2021
  • Doi Number: 10.1149/1945-7111/ac1b01
  • Title of Journal : JOURNAL OF THE ELECTROCHEMICAL SOCIETY
  • Keywords: Conducting polymer, PProDOT, Electrodeposition, methanol oxidation, Platinum nanoparticles, CONDUCTING POLYMERS, IONIC LIQUIDS, FUEL-CELLS, ELECTROOXIDATION, ELECTROCATALYST, IMPEDANCE, GRAPHENE, NANOSTRUCTURES, PERFORMANCE, COMPOSITE

Abstract

Here, we developed a porous network of bromomethyl-substituted 3,4-propylenedioxythiophene polymer using a simple and efficient technique of electrochemical deposition used as conductive support for methanol oxidation. Platinum nanoparticles (PtNPs) are well dispersed and decorated on a high surface area of electrochemically deposited Poly(2-bromomethyl-2-methyl-3,4-propylenedioxythiophene (PProDOT-Br) on a glassy carbon electrode (GCE). A thin film of PProDOT-Br acts as a supporting matrix for deposition of PtNPs and improves the interfacial properties between electrode and electrolyte. The PtNPs-decorated PProDOT-Br (Pt/PProDOT-Br) samples were characterized by X-ray diffraction, Fourier transform infrared attenuated total reflectance spectroscopy, atomic force microscopy, and scanning electron microscopy. Furthermore, the electrocatalytic performance of Pt/PProDOT-Br on GCE for methanol oxidation was assessed by cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy measurements. The findings suggest that the use of Pt/PProDOT-Br/GCE assemblies for efficient methanol oxidation in alkaline media with a small intermediate poisoning is promising for applications as anode material in DMFCs, which should be attributed to the PProDOT-Br support providing a larger surface area with porous nature and enabling the adsorption of more CH3OH for further oxidation. The developed porous network PProDOT-Br with high capacitance may also have large potential in supercapacitor applications.