For the measurement of electrode reaction kinetics and electron transfer rate constant, using E. Laviron's model and RICHARD S. Nicholson's model, the greater peak potential separation indicates lower electron transfer kinetics for these two models? how to understand these two points?
Anal.Chem., 1965, 37, 1351−1355 for RICHARD S. Nicholson's and J. Electroanal. Chem., 101 (1979) 19-28 for E. Laviron's.