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Published August 27, 1997 | public
Journal Article

[5,10,15,20-Tetrakis(4-((pentaammineruthenio)- cyano)phenyl)porphyrinato]cobalt(II) Immobilized on Graphite Electrodes Catalyzes the Electroreduction of O_2 to H_2O, but the Corresponding 4-Cyano-2,6-dimethylphenyl Derivative Catalyzes the Reduction Only to H_2O_2

Abstract

Cobalt porphyrins in which Ru(NH_3)_5^(2+) groups are coordinated to four cyanophenyl ligands pendant to the porphyrin ring act as catalysts for the electroreduction of O_2 when adsorbed on the surface of graphite electrodes. The parent 4-cyanophenyl derivative catalyzes the four-electron reduction of O_2 to H_2O, but the 4-cyano-2,6-dimethylphenyl derivative catalyzes only the two-electron reduction of O_2 to H_2O_2.

Additional Information

© 1997 American Chemical Society. Received March 7, 1997. This work was supported by the U.S. National Science Foundation. The experienced advice and enthusiastic encouragement of Dr. Chunnian Shi are a pleasure to acknowledge.

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023