Iron tetramethoxyphenyl porphyrin

During the 1990s, van Veen and collaborators mainly studied the electrochemical kinetics of oxygen reduction. Their results are presented in Sect. 3. These mechanistic studies were, however, always based on the model in which the C0-N4 or Fe-N4 moieties of the respective macrocycles were retained intact at all pyrolysis temperatures. Their last contribution to the molecular structure of the catalytic site was a study in 2002 of catalysts obtained by adsorption of iron tetramethoxyphenyl porphyrin chloride (ClFeTMPP) on Vulcan XC-72, heat treated between 325 and 800°C in inert atmosphere, and characterized by EXAFS and Mossbauer spectroscopy, as well as by cyclic voltammetry". The loading of these catalysts was 7 wt% chelate ( 0.5 wt% Fe). 

Gojkovic SL, Gupta S, Savinell RF. Heat-treated iron(III) tetramethoxyphenyl porphyrin chloride supported on high-area carbon as an electrocatalyst for oxygen reduction—part II. Kinetics of oxygen reduction. /fifectroanaf Chem... 

A new approach aims at a strong adhesion of the active eenters on a carbon-based matrix. The model is taken from natural components, the physiological equivalent of a catalyst, the porphyrin ring system. These N -macrocycles lead to an activation of the O-O-bond in natural envirorunents, but do not have a direct application in fuel cells in this form. For fuel cell purposes, derivatives are employed including Fe and Co as the central ion. The final compounds, iron or cobalt-tetramethoxyphenyl porphyrin (Fe/Co-TMPP), are thermolytically activated and at the same time stabilized as they are connected to the underlying carbon support. 

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