A. Karantonis et al., Laser experiments and theoretical modeling for the diagnosis of bifurcation sequences of an oscillating electrode reaction, INT J B CH, 11(5), 2001, pp. 1275-1294
The existence of stable and unstable attractors is investigated experimenta
lly for an electrochemical system consisting of a ring iron electrode immer
sed in sulfuric acid solution. The applied potential is considered as the b
ifurcation parameter whereas an external resistance is considered as a seco
nd parameter of the system. The stable and unstable states of the system ar
e revealed by combining steady state and laser perturbation experiments wit
h the bifurcation characteristics. A structure of the steady state curve is
proposed that can predict the experimental dynamical response. The system
is modeled by considering the electrode potential and the concentration of
one of the ionic species as dynamical variables. The resulting boundary val
ue problem is studied numerically and a comparison between the experimental
and theoretical results is performed. It is shown that the model can predi
ct most of the experimental behavior in a good qualitative agreement.