A number of cobalt and iron porphyrins heat treated at temperatures as low as 400° C
exhibit substantial electrocatalytic activity for O 2 reduction and reasonable stability in
alkaline electrolytes. The effects of this heat treatment on the structure and overall properties
of these materials, however, are not well understood. Differential thermogravimetry analyses
have shown that in the case of the Co and Fe-μ-oxo forms of tetra methoxyphenyl porphyrin
(TMPP) and the metal-free form as well, the onset for partial decomposition occurs at …

A number of cobalt and iron porphyrins heat treated at temperatures as low as 400 C exhibit
substantial electrocatalytic activity for O2 reduction and reasonable stability in alkaline
electrolytes. The effects of this heat treatment on the structure and overall properties of these
materials, however, are not well understood. Differential thermogravimetry analyses have
shown that in the case of the Co and Fe-y-ox0 forms of tetra methoxyphenyl porphyrin
(TMPP) and the metal-free form as well, the onset for partial decomposition occurs at …