Morphological and structural aspects of electrochemical catalysis of the reaction of oxygen reduction by the cobalt complex of sodium pectate

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Abstract

Oxygen reduction catalysts based on cobalt complexes of sodium pectate have been developed, which are interesting from the point of view of application in proton-exchange membrane fuel cells. They have been studied by electrochemistry and electron microscopy. As a result of the studies, the catalyst- leader with 15% substitution of sodium ions for Co2+ cations has been determined.

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About the authors

P. Ya. Enders

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Author for correspondence.
Email: enderspolina@mail.ru

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

E. M. Lebedeva

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Email: enderspolina@mail.ru

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

G. R. Nizameeva

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Email: enderspolina@mail.ru

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

R. R. Gainullin

Kazan National Research Technological University

Email: enderspolina@mail.ru
Russian Federation, Kazan

S. T. Minzanova

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Email: enderspolina@mail.ru

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

E. I. Galeeva

Kazan National Research Technological University

Email: enderspolina@mail.ru
Russian Federation, Kazan

Z. V. Mezhevich

Kazan National Research Technological University

Email: enderspolina@mail.ru
Russian Federation, Kazan

E. S. Nefedev

Kazan National Research Technological University

Email: enderspolina@mail.ru
Russian Federation, Kazan

K. V. Kholin

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Email: enderspolina@mail.ru

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

M. K. Kadirov

FRC Kazan Scientific Center, Russian Academy of Sciences; Kazan National Research Technological University

Email: kamaka59@gmail.com

Arbuzov Institute of Organic and Physical Chemistry

Russian Federation, Kazan; Kazan

References

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Supplementary files

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2. Scheme. Scheme for the synthesis of cobalt complexes of sodium pectate.

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3. Fig. 1. CBA curve of Co(15%)-NaPG in 0.5 M H2SO4 aqueous solution showing the amplitude of the oxygen reduction peak (left) and the chronoamperometric curve at a potential of -0.3 V (right). The sweep rate of the potential is 50 mV/s.

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4. Fig. 2. Linear voltammetry curves of Co(15%)-NaPG in 0.5 M H2SO4 aqueous solution obtained at different VDE rates (left) and Koutetsky-Levich dependence for RVC. The potential sweep rate is 50 mV/s.

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5. Fig. 3. Morphological characteristics and amplitudes of the oxygen reduction peak on the CVA curves of Co(n%)-NaPG samples from the cobalt content (a); PEM (b) and AFM (c) images of Co-NaPG aggregates with 15% cobalt content and the topographic histogram corresponding to the AFM image (d).

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