Bharat C. Dalui; Bikash Mandal; Debalina Das; Susanta Ghosh; I. Basumallick
Abstract
The electrochemical performances of electrochemically synthesized polyanilinenano (nPANI) material as cathode vs. zinc metal as anode is investigated.The nPANI particle is synthesized by galvanostatic electro-oxidation of aniline from interfacial solution on metal electrode surface and characterized ...
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The electrochemical performances of electrochemically synthesized polyanilinenano (nPANI) material as cathode vs. zinc metal as anode is investigated.The nPANI particle is synthesized by galvanostatic electro-oxidation of aniline from interfacial solution on metal electrode surface and characterized by UV-Visible, FTIR, powder XRD and TEM. The material is crystalline nano spheres with meso pores among them, uniformly distributed and dispersed. The sizes of the particles lie in 50-100 nm region. This nPANI is used as cathode material in Zn│(NH4)2SO4, ZnSO4(aq)│nPANI battery and its electrochemical performances is investigated by galvanostatic charge-discharge cycling. The electrochemical cell exhibits an open circuit potential of 1.3 volts and a discharge plateau with an average discharge potential of 1.1 volts. The maximum discharge capacity observed is 250 Ah.Kg-1.Copyright © 2017 VBRI Press.
Basu M. Daas; Debalina Das; Susanta Ghosh
Abstract
Present study reports electro-oxidation of ethanol over platinum loaded, reduced graphene oxide – ZSM-5 composite (GO-ZSM) on graphite foil (GF). To prepare the Pt/r(GO-ZSM)/GF electrode, GO-ZSM-5 composite was prepared by simple 1:1 mechanical mixing which was coated over graphite foil and electrochemically ...
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Present study reports electro-oxidation of ethanol over platinum loaded, reduced graphene oxide – ZSM-5 composite (GO-ZSM) on graphite foil (GF). To prepare the Pt/r(GO-ZSM)/GF electrode, GO-ZSM-5 composite was prepared by simple 1:1 mechanical mixing which was coated over graphite foil and electrochemically reduced at a current density of (-)1 mA.cm-2. The electro-chemical studies, such as cyclic voltammetry and chronoamperometry established that Pt/r(GO-ZSM-5)/GF electrode exhibited better tolerance towards CO-poisoning compared to Pt/rGO/GF electrode. The larger IF:IB value for Pt/r(GO-ZSM)/GF indicated much lesser carbonaceous accumulation on the zeolite modified electrode. The peak current density was comparable for both Pt/r(GO-ZSM-5)/GF and Pt/rGO/GF electrodes. Thus ZSM-5 was instrumental in reducing the catalyst poisoning without compromising with the current density. The findings of the investigation can prove useful in the search of solution for the problem of catalyst poisoning associated with platinum electrodes.