Oxygen reduction in acid media: influence of the heat treatment on the FeNPc(1–20 isomer mixture impregnated on carbon blacks and active charcoals
Oxygen reduction with the aid of a number of FeNPc(1–2) impregnated carbon supports in sulphuric acid solutions has been investigated. 
 
Loading of the carbon samples amounted to about 10 wt.%. After a 10 day stay in the aerated solutions the samples were investigated with rotating disk electrode and X-ray photoelectron spectroscopy techniques. The most active and stable samples correspond to mono- or submonolayers of FeNPc deposited on high dibutylphthalate adsorption carbon blacks. Comparison with data obtained previously on Norit BrX impregnations emphasizes the role of the electron density on the inner nitrogen atoms rather than that on the iron centres.
Electrocatalysis of O2 reduction to water in different acid media by iron naphthalocyanines
Abstract The oxygen reduction kinetics have been investigated in different acid media by the RRDE and voltammetric techniques on iron naphthalocyanines. Better activity and stability were found in perchloric acid solutions. In most cases a direct four-electron pathway was shown. The reaction mechanism appears to be associated with a redox couple which should involve the central ion. Correlations can be established between the potential of this redox couple and the activity as seen by the RRDE technique.
Time lapse photography of clouds from high altitude balloons.
Time lapse pictures of clouds taken by cameras flown at altitudes of 30 km on balloons provide valuable insights into the convection and electrification of cloud systems. Simple camera arrangements for taking such pictures are described.