Direct Electron-transfer Reaction of Cytochrome Cat a Bare Spectrographic Graphite Electrode

Chemical Research in Chinese Universities ›› 1995, Vol. 11 ›› Issue (1): 22-27.

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Direct Electron-transfer Reaction of Cytochrome Cat a Bare Spectrographic Graphite Electrode

YU Ai-min, CHEN Hong-yuan, HAN Ji-lin

Department of Chemistry, Nanjing University, Nanjing, 210008

Received:1994-02-21 Online:1995-01-24 Published:2011-08-17
Supported by:
Supported by the National Natural Science Foundation of China.

Abstract

Abstract: The electrochemistry of cytochrome Cwas investigated at a spectrographicgraphite electrode.In phosphate buffer solution (pH= 7.0), cytochrome Cshowedstable and quasi-reversible response.The formal potential E^o' was 0.015 V (at 25℃, vs.SCE) and the heterogeneous electron transfer rate constant k_s obtainedvaried form 1.10×10^-3 cm · s^-1 to 1.80k×10^-3 cm · s^-1.The thermodynamic pa-rameters of the electron transfer reaction of cvtochrome Cwas also estimated.Fur-thermore, the effect of the various electrode surface states on the electrochemistryof cytochrome Cwas discussed.

Key words: Cytochrome C direct electrochemistry, Spectrographic graphite elec-trode, Electron transfer, Rate constant

YU Ai-min, CHEN Hong-yuan, HAN Ji-lin. Direct Electron-transfer Reaction of Cytochrome Cat a Bare Spectrographic Graphite Electrode[J]. Chemical Research in Chinese Universities, 1995, 11(1): 22-27.

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Direct Electron-transfer Reaction of Cytochrome Cat a Bare Spectrographic Graphite Electrode

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