Substituents Effects to the Electrochemical, and In Situ Spectroelectrochemical Behavior of Metallophthalocyanines: Electrocatalytic Application for Hydrogen Evolution Reaction

This study describes the effects of the number of fluoro substituents to the electrochemical, in situ spectroelectrochemical, and electrocatalytic activities of metallophthalocyanines for the hydrogen evolution reaction. Tuning of the number of fluoro groups shifts the redox processes and affects th...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2010-07, Vol.22 (14), p.1623-1633
Main Authors: Koca, Atıf, Özçeşmeci, Mukaddes, Hamuryudan, Esin
Format: Article
Language:English
Subjects:
Agglomeration
Aqueous solutions
Cationic
Chromaticity diagram
Color
Electrocatalyst
Electrodes
Glassy carbon
Hydrogen evolution
Hydrogen evolution reaction
Phthalocyanine
Spectroelectrochemistry
Tuning
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Summary:This study describes the effects of the number of fluoro substituents to the electrochemical, in situ spectroelectrochemical, and electrocatalytic activities of metallophthalocyanines for the hydrogen evolution reaction. Tuning of the number of fluoro groups shifts the redox processes and affects the aggregation tendencies of the complexes. An in situ electrocolorimetric method was applied to investigate the color of the electrogenerated anionic and cationic forms of the complexes. Cobalt phthalocyanines incorporated into Nafion film on a glassy carbon electrode decreases the overpotential of the working electrode for H+ reduction. The number and position of the electron withdrawing substituents and nature of the metal center change the electrocatalytic activities for the hydrogen evolution reaction in aqueous solutions.
ISSN:1040-0397
1521-4109
1521-4109
DOI:10.1002/elan.200900545