Oxygen Influence on Complex Oscillations in a Closed Belousov−Zhabotinsky Reaction

Abstract

The influence of oxygen on the cerium-catalyzed Belousov-Zhabotinsky reaction is investigated in a system that is closed except for transport of oxygen from the atmosphere across a free surface. Experiments show that the introduction of oxygen increases the complexity of oscillations and shortens their duration. We determine the dependence of the oscillatory pattern on the concentration of oxygen in the reaction mixture, as measured with an oxygen electrode and controlled through the content of oxygen above the free surface. We show that the influence of the stirring rate under aerobic conditions is mainly an oxygen effect and report oscillations of the oxygen concentration. Calculations based on a modified Oregonator model show that the influence of oxygen can be qualitatively accounted for through the effect of two rate constants.

Oxygen Inhibition of Oscillations in the Belousov−Zhabotinsky Reaction

“…[1][2][3][4][5][6] The inhibitory effect of oxygen has already been reported shortly after the development of the Field-Körös-Noyes (FKN) mechanism 7 and confirmed the assumption of a free-radical mechanism. 8 A decreasing sensitivity of the BZ reaction toward oxygen with increasing acidity was discussed.…”

Inhibitory effect of oxygen on excitation waves in the Belousov–Zhabotinsky reaction with different excitability

“…For well-stirred BZ solutions, oxygen affects the oscillatory behavior. It can lengthen the induction time [16] and the oscillation period [14], cause earlier death of oscillations [17,18], drive the reaction into an excitable steady state [19], and create complex oscillations [20]. Furthermore, oscillations disappear through different bifurcations, depending on the concentration of oxygen in the atmosphere [21].…”

Nonlinear Phenomena during the Oxidation and Bromination of Pyrocatechol

“…The system is now commonly known as the Belousov-Zhabotinsky (BZ) reaction (Zaikin & Zhabotinsky, 1970;Field & Burger, 1985). Since then, the study of chemical oscillations and wave formation has blossomed, which led to the observation of various nonlinear spatiotemporal behaviours such as both simple and complex oscillations in a stirred system (Smoes, 1979;Györgi & Field, 1992;Wang et al, 1995Wang et al, & 1996Zhao et al, 2005), Turing pattern (Horváth et al, 2009), target and spiral waves in a two-dimensional reactiondiffusion medium (Zaikin & Zhabotinsky, 1970;Winfree, 1972;Yamaguchi et al, 1991;Steinbock et al, 1995;Kádár et al, 1998), and scroll waves in a 3-dimensional system (Welsh et al, 1983;Winfree, 1987;Jahnke et al, 1988;Amemiya et al, 1996). Understanding the onset of those exotic phenomena in chemical systems has provided important insight into the formation of similar behaviour in nature (Goldbeter, 1996;Dutt & Menzinger, 1999;Dhanarajan et al, 2002;Carlsson et al, 2006;Chiu et al, 2006).…”