Effect of the Formation Conditions on the Activity of Co-N-C Electrocatalysts Derived from Poly-m-Phenylenediamine in the Reduction of Oxygen

The use of a mixture of m-phenylenediamine and ammonium persulfate instead of previously prepared poly-m-phenylenediamine as nitrogen source permits us to simplify the formation of pyrolyzed Co-N-C electrocatalysts for the reduction of oxygen and leads to greater activity of these electrocatalysts i...

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Bibliographic Details
Published in:Theoretical and experimental chemistry 2019-01, Vol.54 (6), p.386-394
Main Authors: Pariiska, O. O., Mazur, D. O., Kurys, Ya. I., Koshechko, V. G., Pokhodenko, V. D.
Format: Article
Language:English
Subjects:
Acetylene
Ammonium peroxodisulfate
Catalysts
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Cobalt sulfide
Electrocatalysts
Electrolytes
Fuel cell industry
Graphene
Nitrogen
Phenylenediamine
Reduction
Sulfates
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Summary:The use of a mixture of m-phenylenediamine and ammonium persulfate instead of previously prepared poly-m-phenylenediamine as nitrogen source permits us to simplify the formation of pyrolyzed Co-N-C electrocatalysts for the reduction of oxygen and leads to greater activity of these electrocatalysts in acid electrolytes due to the presence of Co 9 S 8 . The replacement of acetylene black by graphene oxide in the formation of such composites leads to an increase in the electrochemically-active surface area of the catalyst and, as a consequence, improvement of its current characteristics.
ISSN:0040-5760
1573-935X
DOI:10.1007/s11237-019-09585-7