Electrochemistry of hydrogen peroxide reduction reaction on carbon paste electrodes modified by Ag- and Pt-supported carbon microspheres

A simple and facile hydrothermal methodology for preparation of carbon microspheres supported with silver or platinum is presented. Electrocatalytic properties of modified carbon microspheres are tested against the electrochemical reduction reaction of hydrogen peroxide. As revealed by transmission...

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Bibliographic Details
Published inJournal of solid state electrochemistry Vol. 23; no. 4; pp. 1257 - 1267
Main Authors Randjelović, Marjan S., Momčilović, Milan Z., Enke, Dirk, Mirčeski, Valentin
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 12.04.2019
Springer Nature B.V
Subjects
Analytical Chemistry
Carbon
Characterization and Evaluation of Materials
Chemical reduction
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Electrodes
Energy Storage
Hydrogen peroxide
Microscopy
Microspheres
Nanoparticles
Original Paper
Physical Chemistry
Platinum
Scanning electron microscopy
Silver
Transmission electron microscopy
Voltammetry
Electrocatalysis
Hydrogen peroxide
Carbon microspheres
Square-wave voltammetry
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Summary:A simple and facile hydrothermal methodology for preparation of carbon microspheres supported with silver or platinum is presented. Electrocatalytic properties of modified carbon microspheres are tested against the electrochemical reduction reaction of hydrogen peroxide. As revealed by transmission electron microscopy, silver and platinum are immobilized on the surface of carbon microspheres in a form of nanoparticles. In addition, scanning electron microscopy reveals coexistence of smooth surface spherical-shaped carbon microspheres together with clusters that resemble a bunch-of-grapes. Carbon paste electrodes in combination with cyclic and square-wave voltammetry are used to study electrocatalytic properties of carbon microspheres. Voltammetric data are analyzed in light of the theory for simple irreversible electrode reaction. Correlation between experimental and theoretical data implies the highest electrocatalytic effect in the case of silver-modified carbon microspheres, though the electrode mechanism is more complex than theoretically predicted.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-019-04226-4