Autocatalytic growth of polyaniline

Figure 12.8 (d) Frequency response indicating autocatalytic growth of polyaniline from 55th second. [87],... 

However, Trivedi et al. [95] have argued that when there is a possibility of autocatalytic growth of polyaniline, the lower electrochemical potential does not favour the formation of such a crosslinked moiety, unless one crosses the threshold limit of 0.8 V versus SCE. Thus, according to these authors, the middle peak is due to quinone/hydroquinone, whose formation is possible because under acidic conditions the cation radical can be hydrolysed to yield benzoquinone. 

It has been observed [100] that with H2SO4 as an electrolyte there is a continuous rise in current after an initial decay, suggesting parallel nucleation along with autocatalytic growth of polyaniline. 

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