On the Extraction of Double-Layer Capacitances for Nonideal Capacitive Behaviors

ÖZCAN M., DEHRİ İ., ERBİL M.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, vol.51, no.43, pp.14061-14064, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 51 Issue: 43
  • Publication Date: 2012
  • Doi Number: 10.1021/ie301609j
  • Journal Name: INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.14061-14064
  • Çukurova University Affiliated: Yes

Abstract

The equation for ideal capacitive behavior of a metal/solution interface was modified in such a way that it allows direct extraction of double-layer capacitance (C-dl) values as a function of the frequency from complex plane plots exhibiting nonideal behavior. Experimental impedance data verified by the Kramers-Kronig (K-K) transforms were presented for a mild steel/hydrochloric acid interface in the absence and presence of an organic additive. The results revealed that the modified equation works well for real systems.