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Title: Single walled carbon nanotubes decorated vanadyl phthalocyanine composite for electrochemical oxygen reduction in fuel cells
Authors: Sonkar, Piyush Kumar
Ganesan, Vellaichamy
Singh, Ravi Kant
Yadav, Dharmendra Kumar
Gupta, Rupali
Yadav, Mamta
Keywords: Electrochemistry;Electrocatalysis;Oxygen reduction;Fuel cells;Cyclic voltammetry;Single walled carbon nanotubes;Vanadyl phthalocyanine
Issue Date: Aug-2017
Publisher: NISCAIR-CSIR, India
Abstract: Vanadyl phthalocyanine (VOPc) has been immobilized on single walled carbon nanotubes by the adsorption process and characterized using UV-vis spectroscopy, infrared spectroscopy and X-ray diffraction techniques. Electrochemical characterization of VOPc immobilized SWCNTs (SWCNTs-VOPc) has been done by coating an aqueous colloid of SWCNTs-VOPc on glassy carbon electrode (represented as GC/SWCNTs-VOPc). GC/SWCNTs-VOPc exhibits a pair of peaks at –265 and –97 mV (at 20 mV s-1 in 0.1 M H2SO4) due to the characteristic redox process, VIV/III of VOPc. Further, electrocatalytic reduction of oxygen is analysed using GC/SWCNTs-VOPc electrode by cyclic voltammetry. GC/SWCNTs-VOPc electrode efficiently reduces oxygen in 0.1 M H2SO4 with a low onset potential of 0.16 V. Also, GC/SWCNTs-VOPc exhibits significant storage stability, retaining 91% of its original catalytic reduction current after 10 days storage at room temperature in air and dry conditions.
Page(s): 821-825
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.56A(08) [August 2017]

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