Research on chemically modified electrodes: Electrocatalytic reduction of dioxygen by iron tetraphenylporphyrin modified glassy carbon electrode with heat treatment
- 1 April 1987
- journal article
- research article
- Published by Wiley in Berichte der Bunsengesellschaft für physikalische Chemie
- Vol. 91 (4) , 479-484
- https://doi.org/10.1002/bbpc.19870910450
Abstract
The heat treatment of iron tetraphenylporphyrin chemically modified glassy carbon electrode is described. This electrode shows high catalytic activity and good stability for dioxygen reduction. Its catalytic activity is still maintained through 1000 cycles of potential scans (100 mv/s) in an air saturated solution of 0.05 M H2SO4 after a heat treatment to 500°C. Using XPS, Mössbauer, UV‐VIS spectroscopy and mass spectroscopy the microstructure of the electrode surface has been analyzed. The electrocatalytic and dynamic behavior for dioxygen reduction has been studied by cyclic voltammetry and rotating disk electrode respectively. The rate constants for dioxygen reduction at the electrode in a variety of pH solutions have been measured.Keywords
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