Additive differential pulse voltammetry,instead of double differential pulse voltammetry |
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| Affiliation: | 1. Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou, College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;2. College of Chemistry and Chemical Engineering, Zhaotong University, Zhaotong 657000, China;3. College of Health, Hainan Technology and Business College, Haikou 570203, China;4. College of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China;5. Hainan Environmental Monitoring Centre, Hainan, Research Academy of Environmental Sciences, Haikou 570206, China |
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| Abstract: | A new electrochemical double pulse potential technique called additive differential pulse voltammetry (ADPV) is proposed. This technique is inspired by the original idea of Birke et al. [Anal. Chem. 53 (1981) 852] of recording two differential pulse (DP) voltammograms and it consists of plotting the sum of these two signals versus the first pulse potential, although in this paper the proposal is to obtain the ADPV signal through just one experiment. ADPV behaves in an identical way to the triple-pulse technique double differential pulse voltammetry (DDPV) for reversible processes when diffusion coefficients are equal for spherical electrodes and for any value of diffusion coefficients in planar electrodes. In the case of reversible electrode processes with amalgamation of reaction product or other more complex processes, ADPV is more advantageous than DDPV. This is due, among other reasons, to the fact that, under these conditions, a double potential step is much simpler to analyse than a triple potential step. |
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