Studies of chemical stage of synthesis of electroactive composite based on poly-o-phenylenediamine and graphene oxide

Formation of an electroactive composite based on graphene oxide and poly- o -phenylenediamine (PPD) was studied. Electron absorption spectra were used to confirm formation of a strong chemical bond at a prolonged contact of unreduced graphene oxide on a conducting support (glassy carbon, SnO 2 ) and...

Full description

Saved in:
Bibliographic Details
Published in:Russian journal of electrochemistry 2017, Vol.53 (1), p.70-77
Main Authors: Pisarevskaya, E. Yu, Ehrenburg, M. R., Ovsyannikova, E. V., Efimov, O. N., Andreev, V. N.
Format: Article
Language:English
Subjects:
2015
Absorption spectra
Bonding
Chemical bonds
Chemical synthesis
Chemistry
Chemistry and Materials Science
Composite structures
Electroactivity
Electrochemical oxidation
Electrochemistry
Glassy carbon
Globules
Graphene
Morphology
October 21–23
Part 2
Phenylenediamine
Physical Chemistry
Polymerization
Special Issue: X International Frumkin Symposium on Electrochemistry (Moscow
Tin dioxide
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Formation of an electroactive composite based on graphene oxide and poly- o -phenylenediamine (PPD) was studied. Electron absorption spectra were used to confirm formation of a strong chemical bond at a prolonged contact of unreduced graphene oxide on a conducting support (glassy carbon, SnO 2 ) and o -phenylenediamine monomer solution. Here, graphene oxide is partially reduced and oxidation and partial polymerization of o -phenylenediamine starts. It is shown that electrochemical oxidation of the obtained composite under the conditions of cyclic voltammetry results in the further polymerization of o -phenylenediamine bound to graphene oxide; here, reduction of graphene oxide continues, and at much lower cathodic potentials than in the absence of o -phenylenediamine. Morphology of the obtained composite was studied using the AFM technique. PPD embedded into the composite structure does not allow nanosheets of reduced graphene oxide (RGO) to corrugate and imparts the morphology of the composite the shape of globules with a clearly pronounced structure. As a result, the RGO–PPD composite was obtained that demonstrated pronounced electroactivity in a wider range of potentials than in the case of nonmodified PPD.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193517010104