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Phosphotungstic acid‐Titania loaded polyaniline nanocomposite as efficient methanol electro‐oxidation catalyst in fuel cells
Author(s) -
Lakshmi M. Suba,
Wabaidur Saikh Mohammad,
Alothman Zeid Abdullah,
Johan Mohd Rafie,
Ponnusamy Vinoth Kumar,
Dhanusuraman Ragupathy
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5950
Subject(s) - chronoamperometry , cyclic voltammetry , nanocomposite , polyaniline , phosphotungstic acid , dielectric spectroscopy , materials science , methanol fuel , chemical engineering , fourier transform infrared spectroscopy , catalysis , electrode , methanol , electrochemistry , polymerization , chemistry , polymer , nanotechnology , organic chemistry , composite material , engineering
Summary In this study, we report a new phosphotungstic acid‐Titania embedded polyaniline (PANI/PTA/TiO 2 ) nanocomposite modified hybrid electrode for efficient methanol electro‐oxidation reaction. The PANI/PTA/TiO 2 nanocomposite was prepared via a simple in‐situ polymerization method. The fabricated modified electrode's surface morphology and elemental analysis were characterized using field‐emission scanning electron microscopy with energy‐dispersive X‐ray spectroscopy and mapping technique. The phase structure and molecular vibrational studies were identified using an X‐ray diffraction and Fourier‐transform infrared spectroscopic techniques. The electrochemical performance of the modified electrodes was studied using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopic techniques. The PANI/PTA/TiO 2 nanohybrid modified electrode displayed the superior electro‐catalytic activity towards methanol oxidation reaction at 0.2 V potential with the charge transfer resistance of 218 Ω, and showed excellent stability up to 1200s in an alkaline medium. The developed nanocomposite material can be used as a potential nanohybrid anode catalyst for the application of direct methanol fuel cells.