How are cyclic voltammograms affected by the electron transfer rate?
Scan rate is 100 mV/sec.
Electron transfer rate ks = 104, 103, 100,
10, 1, 0.1, 0.05, 0.02, 0.01, 0.005, 0.002, 0.001, 0.0005, 0.0002, 0.0001
cm/sec. When is the voltammogram no longer Nernstian?
How are cyclic voltammograms affected by changing scan rate if the electron transfer is slow?
ks = 0.001 cm/s electron transfer rate. Scan rate = 1, 2, 5, 10,
20, 50, 100, 200, 500, 1000 mV/sec.
Notice that the current scale is not constant since current varies with scan
rate. When is the voltammogram no longer Nernstian?
0.001 M sample with E0 = -0.200 volts, A = 0.1 cm2 electrode,
D = 10-5 cm2/sec diffusion.