Heterogeneous Electron Transfer Kinetic and Mechanistic Studies

Heterogeneous Electron Transfer Kinetic and Mechanistic Studies 

Three mechanisms for the reduction of cytochrome c were originally proposed by Betso et at hole conduction through the protein fabric of adsorbed molecules, electron transfer between the mercury surface and the exposed heme edge of adsorbed molecules followed by desorption, and electron transfer between the mercury surface and the exposed heme edge of adsorbed 

Protein studied Electrode used in study References 

Scheller s mechanism also involves an irreversibly adsorbed layer of cytochrome c molecules but with a smaller degree of unfolding of the molecule. It has been recently suggested, moreover, that the first adsorbed layer may involve only minor deformation of the cytochrome c molecules. Electron transfer was initially proposed to occur via a hopping mechanism through the adsorbed layer of denatured molecules to native molecules in a weakly adsorbed second layer. The presence of pores in the first adsorbed 

A related model, put forth by Haladjian et involves an adsorbed 

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