Application of radioisotope techniques for the study of phthalocyanine catalyzed electrochemical processes in fuel cells

Journal Article · Thu Apr 21 04:00:00 EST 1977 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100523a007· OSTI ID:7213551

Meier, H; Tschirwitz, U; Zimmerhackl, E; Albrecht, W; Zeitler, G

The behavior of polymeric iron phthalocyanine catalysts during the cathodic reduction of oxygen in sulfuric acid was studied by labeling central iron atoms with /sup 59/Fe. Moreover, in order to get an insight into the interaction between iron polyphthalocyanines and carbon supports, Moessbauer spectroscopic investigations have been undertaken. The experiments showed that iron polyphthalocyanine electrocatalysts, which are built in carbon--teflon electrodes, could be classified in (a) phthalocyanine molecules with low stability and large quadrupole splitting which have only a low influence on the electrochemical operation of the electrode and (b) phthalocyanine molecules with high stability and low quadrupole splitting which are decisive in electrocatalysis. In agreement with the mechanism of long-life electrocatalytic operation and deactivation, derived from these experiments, carbon--teflon cathodes with polymeric iron polyphthalocyanine catalysts could be constructed which are characterized by a high stability during continuous operation in 6 N H/sub 2/SO/sub 4/ up to 3000 h. (48 references)

• Research Organization: Staatliches Forschungsinstitut fuer Geochemie, Bamberg, Ger.
• OSTI ID: 7213551
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 8; ISSN JPCHA
• Country of Publication: United States
• Language: English

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30 DIRECT ENERGY CONVERSION
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ACID ELECTROLYTE FUEL CELLS
BETA DECAY RADIOISOTOPES
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CATALYSTS
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PETROLEUM PRODUCTS
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SULFURIC ACID
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