Chemically Modified Electrodes

Electrooxidation of sulfide by cobalt pentacyanonitrosylferrate film on glassy carbon electrode by cyclic voltammetry

“…Modification of the Co/GC electrode binds the [Fe(CN) 5 NO] 2− to the Co in the surface of the electrode, thus forming the film of CoPCNF/GC. The modification step was carried out using a potentiodynamic method in a 0.25 M KNO 3 and 50 mM Na 2 [Fe(CN) 5 NO] solution.…”

“…Metallic Co was first deposited from 0.50 M H 3 BO 3 , 0.50 M KNO 3 and 0.05 M CoCl 2 onto the GC electrode with application of a constant potential of −1.15 V for 100 s. The GC electrode covered with metallic Co was then immersed in 0.25 M KNO 3 and 50 mM Na 2 [Fe(CN) 5 NO] and modified by cycling the electrode potential between −0.2 and 0.75 V about 65 times with a scan rate of 50 mV s −1 , until a stable voltammogram was observed.…”

“…The modification step was carried out using a potentiodynamic method in a 0.25 M KNO 3 and 50 mM Na 2 [Fe(CN) 5 NO] solution. The growth of the CoPCNF/GC film during the scanning of the potential between −0.2 and 0.75 V and a scan rate of 50 mV s −1 is depicted in Fig.…”

“…CMEs offer a possibility of lowering the overpotential and of increasing the sensitivity and selectivity of some electroactive species [5].…”

Electron Transfer Reactivity Patterns at Chemically Modified Electrodes: Fundamentals and Application to the Optimization of Redox Recycling Amplification Systems

“…Chapter 5 presents data for the first observation of an odd-even effect in the heterogeneous electron transfer kinetics of solution-based redox couples at alkanethiolates on gold. In attempting to account for these data, these electron transfer theories will be useful; however, it is somewhat difficult to definitively determine the precise origins of this effect since we have also discovered an oddeven variation in thickness that may also cause such oscillations [23,152].…”