Additive differential pulse voltammetry, instead of double differential pulse voltammetry

A new electrochemical double pulse potential technique called additive diff erential pulse voltammetry (ADPV) is proposed. This technique is inspired b y the original idea of Birke et al. [Anal. Chem, 53 (1981) 852] of recordin g two differential pulse (DP) voltammograms and it consists of plotting the sum of these two signals versus the first pulse potential, although in thi s paper the proposal is to obtain the ADPV signal through just one experime nt. ADPV behaves in an identical way to the triple-pulse technique double d ifferential pulse voltammetry (DDPV) for reversible processes when diffusio n coefficients are equal for spherical electrodes and for any value of diff usion coefficients in planar electrodes. In the case of reversible electrod e processes with amalgamation of reaction product or other more complex pro cesses, ADPV is more advantageous than DDPV. This is due, among other reaso ns, to the fact that, under these conditions, a double potential step is mu ch simpler to analyse than a triple potential step. (C) 2001 Published by E lsevier Science B.V.