Cyclic voltammetry of electroactive and insulative compounds in solid state: A revisit of AgCl in aqueous solutions assisted by metallic cavity electrode and chemically modified electrode
作者： Junjun Peng , Yuan Deng , Dihua Wang , Xianbo Jin , George Z. Chen
DOI: 10.1016/J.JELECHEM.2008.12.016
关键词:
摘要: Abstract A novel platinum cavity electrode (Pt-CE) was fabricated by drilling a small circular (0.5 mm diameter) through thin Pt foil (ca. 0.15 mm thickness, 2.0 mm width). It used to record cyclic voltammograms (CVs) of the insulative AgCl powder (as model) in aqueous solutions. The voltammetric response fast (tested 100 mV/s) and charge under reduction peak agreed well with mass powder. Further, CVs were featured not only an “irreversible” peak, but also linear logarithm correlations between potential scan rate current or potential. Similar results obtained from coating modified Ag disc electrodes (1.0 mm formed anodisation chloride Based on these common kinetic properties, general explanation is proposed according mixed control electro-reduction transfer at conductor/insulator/electrolyte three phase interlines diffusion generated porous metal layer. In addition, some exhibited minor less negative potentials origin identified experimentally.
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