Abstract: A nonuniform space-volume-grid system is generated by repeatedly dividing thesolution layer next to the electrode surface. For outer limit of the ith grid it is simply ex-pressed as.With a dividing factorβ≥2the generated space-volume grid is ex-panded by the factor ofβfor i>2,however the volume ratio for the second and the first gridis onlyβ-1.The simulation accuracy and stability of the grid system for explicit-finite-difference algorithm are characterized by experiments of chronoamperometry and cyclicvoltammetry experiments,The results demonstrate that the simulation is relatively stableand accurate enough for theoretical comparison at β=2.This system can even be operated for time-saving qualitative test at βvalues as large as 16.

Key words: electroanalytical chemistry, digital simulation, nonumiform space-volume grid