Abstract
A stable suspension of nanopolyaniline (nPANI) particles can be used in various applications instead of a polyaniline film. The electrochemical behavior of a stable suspension of nPANI particles, in strongly acidic conditions of HCl at the gold electrode surface, was investigated using various electrochemical and surface analysis methods. Voltammetry results showed two redox transformations indicating the adsorption and diffusion-controlled mechanism of nPANI particles. Moreover, the decrease in pH causes an increase in the number of electrons transferred per nPANI particles. The adsorption data were fitted by the Langmuir adsorption isotherm and the maximum surface coverage decreases with the increment of pH. The adsorption of nPANI particles was confirmed by the surface analysis methods. Moreover, the quantum chemical calculation and Monte Carlo simulation approved the electrochemical results for the effect of pH on the adsorption of nPANI particles at the gold electrode surface.
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Acknowledgment
We highly appreciate Khorasan Razavi Gas Co. for their provision of laboratory facilities for conducting the experiments required in this research study. And, we hereby acknowledge that part of this computation was performed on the HPC center of the Ferdowsi University of Mashhad.
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Biabangard, F., Nazari, H. & Arefinia, R. Effect of pH on the electrochemical properties of polyaniline nanoparticle suspension in strongly acidic solution: an experimental and theoretical study. J Solid State Electrochem 25, 881–893 (2021). https://doi.org/10.1007/s10008-020-04863-0
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DOI: https://doi.org/10.1007/s10008-020-04863-0