Here we report a zinc paddlewheel and iron porphyrin based metal-organic framework capable of electrocatalytic reduction of oxygen. Cyclic voltammetry and rotating disk electrode voltammetry were used to characterize its electrochemistry and electrocatalytic activity. Results from the Kouteck�-Levich analysis suggest that the oxygen reduction reaction proceeds via the direct 4-electron pathway, a more desirable pathway that does not involve the generation of hydrogen peroxide. It is noteworthy that this material not only is stable in an aqueous medium, it also functions well as an electrocatalyst in a strong acidic medium for over 42 days.Cyclic voltammetry scans of an unmodified carbon paste electrode (CPE) (blue) and a PPF-5-Fe/Zn-modified CPE in air saturated (red), N2 deoxygenated (purple), and H2O2-containing deoxygenated 0.5 M H2SO4 (green).

Metal-organic frameworks as electrocatalysts for oxygen reduction reaction

246th National Meeting (2013)

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