Open AccessHydrogen storage capacity of polypyrrole in alkaline medium: effect of oxidants and counter anions
Author(s) -
S. Padmapriya,
S. Harinipriya
Publication year - 2019
Publication title -
journal of materials research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.832
H-Index - 44
eISSN - 2214-0697
pISSN - 2238-7854
DOI - 10.1016/j.jmrt.2019.07.055
Subject(s) - polypyrrole , cyclic voltammetry , raman spectroscopy , dielectric spectroscopy , hydrogen storage , scanning electron microscope , materials science , differential scanning calorimetry , hydrogen , linear sweep voltammetry , electrochemistry , redox , analytical chemistry (journal) , inorganic chemistry , chemistry , electrode , organic chemistry , composite material , metallurgy , physics , optics , thermodynamics
Polypyrrole(Ppy) synthesized by wet chemical method using FeCl3 and (NH4)2S2O8 as oxidants were subjected to analysis by Scanning Electron Microscopy, X-ray diffraction, UV-visible spectroscopy, Differential scanning calorimetry, Raman and 1HNMR techniques. Electrochemical analysis such as cyclic voltammetry, linear sweep voltammetry and impedance spectroscopy of Ppy were performed. Charge/Discharge studies in 0.01 M NaOH showed hydrogen storage capacity of P p y FeC l 3 and PpyAPS as 27.24 and 24.4 mA h/g respectively, implying stable hydrogen storage by P p y FeC l 3 . This variation in the ability of storing hydrogen by Ppy with change in oxidants is attributed to the formation of anion induced H-bonded structures in the backbone of Ppy as supported by Raman and 1HNMR analysis.
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