Spinels as cathodes for the electrochemical reduction of O2 and NO

Vibe Louise Ernlund Simonsen, D. Find, M. Lilliedal, R. Petersen, Kent Kammer Hansen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Spinels were synthesised and investigated as electro-catalyst for the electrochemical reduction of oxygen and nitric oxide using cyclic voltammetry and cone shaped electrodes. The following four spinels were investigated; CoFe2O4, NiFe2O4, CuFe2O4 and Co3O4. The composition CuFe2O4 revealed the largest difference in activity between reduction of oxygen and the reduction of nitric oxide, the activity being highest for the reduction of nitric oxide. The material is probably not stable when polarised cathodically. However it seems that the electrode material can be regenerated upon oxidation. NiFe2O4 is also more active for the reduction of nitric oxide than for the reduction of oxygen, whereas the cobalt containing spinels have a higher activity for the reduction of oxygen than for the reduction of nitric oxide.
    Original languageEnglish
    JournalTopics in Catalysis
    Volume45
    Issue number1-4
    Pages (from-to)143-148
    ISSN1022-5528
    DOIs
    Publication statusPublished - 2007

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