Related Experiment Video
Updated: Aug 15, 2026

A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells
Published on: December 11, 2019
Intrinsic coherence resonance in an electrochemical cell
M Rivera1, Gerardo J Escalera Santos, J Uruchurtu-Chavarín
1Centro de Ciencias Físicas, UNAM, Cuernavaca 62210, Morelos, México.
Abstract:
We study the interaction of intrinsic electrochemical noise with autonomous nonlinear dynamics of a three-electrode electrochemical cell. The amplitude of this intrinsic (internal) noise, regulated by the concentration of chloride ions, is monotonically increased and the provoked dynamics is analyzed. The experimentally constructed coherence factor beta versus the concentration of the chloride ions' curve has a unimodal shape indicating the emergence of intrinsic coherence resonance. The abscissa for the maxima of this unimodal curve corresponds to the optimum value of intrinsic noise where maximum regularity of the invoked dynamics is observed.
Related Concept Videos
Electrochemical Cells
Electrochemistry: Overview
Electrochemical Systems
Cell Diagrams and IUPAC Conventions
Voltaic/Galvanic Cells
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Junction Potentials in Galvanic Cells

