Polyferredoxin-based electrode materials.
Electrochemical oxidation of the hydrosulfide cluster [Fe4S4(SH)4]2- on gold, platinum or vitreous carbon in a methyl cyanide electrolyte leads to the growth of a conducting film. Spectroscopic and other evidence suggests that the film has cubane centres, predominately in the [4Fe4S]3+ oxidation state, which are linked by disulfide ligands to give an anionic array of [Fe4S4(S approximately)4]n- units. X-ray data suggests some long-range order in the electrode material. The polyferredoxin binds redox active cations consistent with an anionic array.
Pickett
C J
CJ
Department of Biological Chemistry, John Innes Centre, Norwich, UK NR4 7UH.
Ibrahim
S K
SK
Hughes
D L
DL
D003460:Crystallization; D004566:Electrodes; D005288:Ferredoxins / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008958:Models, Molecular; D010084:Oxidation-Reduction
D005288:Ferredoxins