Iron-phthalocyanine surface area

Baranton S, Coutanceau C, Roux C, Hahn F, Leger JM. 2005. Oxygen reduction reaction in acid medium at iron phthalocyanine dispersed on high surface area carbon substrate tolerance to methanol, stability and kinetics. J Electroanal Chem 577 223-234. 

The effect of the gaseous atmosphere was studied by Tarasevich and Radyuskina who concluded that under N2, Ar, and He in the temperature range of 500-1,000 °C for different dwell times between 0.3 and 5.0 h, the activity and durability of the studied metalloporphyrins and metallo-phthalocyanines were similar [25]. This was a case for disagreement between different groups who observed dependence between the activity of heat-treated catalysts and the gas used during the heat treatment. For example, Dhar et al. showed the difference in the catalytic activity of heat-treated CoTAA under vacuum, N2, Ar, and N [26]. They concluded that the most active ORR catalyst was obtained under vacuum with the following decrease in activity vacuum > N2 > Ar > N (Fig. 8.2). Dodelet and his collaborators [27] showed that an iron tetra(methoxyphenyl) porphyrin is the most stable, but the least active when heat-treated in Ar, and that it becomes very active and loses its stability when treated in ammonia, an effect attributed to the concurrent increase in the microporous surface area, as well as the N and Fe surface content. The authors raised important questions about the catalyst design and optimum heat-treatment conditions for maximum stability and activity. 

Tanaka A, Fierro C, Scherson D, Yeager E (1987) Electrocatalytic aspects of iron phthalocyanine and its p-oxo derivatives dispersed on high surface area carbon. J Phys Chem 91(14) 3799-3807... 

Scherson DA, Fierro C, Tryk D, Gupta SL, Yeager EB, Eldridge J, Hoffman RW (1985) In situ Mdssbauer spectroscopy and electrochemical studies of the thermal stability of iron phthalocyanine dispersed in high surface area carbon. J Electroanal Chem 184 419-426... 

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