Evidence of a chaotic transient in a closed unstirred cerium catalyzed Belousov-Zhabotinsky system

Rustici, Mauro; Branca, Mario; Caravati, Carlo; Marchettini, Nadia

doi:10.1016/s0009-2614(96)01249-3

Cited by 24 publications

(29 citation statements)

References 21 publications

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“…The Ce(III)/Ce(IV) redox couple also participates in the Belousov-Zhabotinsky oscillating reaction via autocatalytic oxidation [229,230]. Efforts have been devoted to further study the effects and kinetics of cerium in such complex reaction mechanisms [231][232][233][234][235], including the reaction mechanism with malonic acid [236,237].…”

Section: Other Applicationsmentioning

confidence: 99%

Electrochemical redox processes involving soluble cerium species

Arenas

León

Walsh

2016

Electrochimica Acta

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Anodic oxidation of cerous ions and cathodic reduction of ceric ions, in aqueous acidic solutions, play an important role in electrochemical processes at laboratory and industrial scale. Ceric ions, which have been used for oxidation of organic wastes and off-gases in environmental treatment, are a wellestablished oxidant for indirect organic synthesis and specialised cleaning processes, including oxide film removal from tanks and process pipework in nuclear decontamination. They also provide a classical reagent for chemical analysis in the laboratory. The reversible oxidation of cerous ions is an important reaction in the positive compartment of various redox flow batteries during charge and discharge cycling. A knowledge of the thermodynamics and kinetics of the redox reaction is critical to an understanding of the role of cerium redox species in these applications. Suitable choices of electrode material (metal or ceramic; coated or uncoated), geometry/structure (2-or 3-dimensional) and electrolyte flow conditions (hence an acceptable mass transport rate) are critical to achieving effective electrocatalysis, a high performance and a long lifetime. This review considers the electrochemistry of soluble cerium species and their diverse uses in electrochemical technology, especially for redox flow batteries and mediated electrochemical oxidation.

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Section: Other Applicationsmentioning

confidence: 99%

Electrochemical redox processes involving soluble cerium species

Arenas

León

Walsh

2016

Electrochimica Acta

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“…We proved that the aperiodic pattern shows evidence of sensitivity to initial conditions, which is considered to be the major feature of chaos. 9 We also showed that, during the chemical evolution, the system spontaneously gives the following sequence of dynamic behaviour before reaching equilibrium: period-1 3 quasi-periodicity 3 chaos 3 quasi-periodicity 3 period-1. Two transition scenarios were observed: at the onset of chaos and at its end.…”

Section: Introductionmentioning

confidence: 69%

Recurrence quantification analysis of spatio-temporal chaotic transient in a closed unstirred Belousov–Zhabotinsky reaction

Masia

Bastianoni

Rustici

2001

Phys. Chem. Chem. Phys.

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We analyse the transient spatio-temporal chaos that we observe in the Belousov±Zhabotinsky reaction performed in a closed unstirred batch reactor by recurrence quanti®cation analysis (RQA). We characterize the chaotic transient by measuring the Lyapunov exponent and the Kaplan±Yorke dimension. The latter shows the fractality of the attractor. The importance of the coupling between hydrodynamics and kinetics for the onset of chaos is also shown.

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“…Recently, we showed that the observed aperiodic signal is a manifestation of chaos and is due to an interplay between chemical kinetics and convection‐diffusion. 14…”

Section: Resultsmentioning

confidence: 99%

“…13 In this paper the coupling of the chaotic or regular oscillating phenomena that occurs in different parts of the same well-premixed oscillating solution and the effect of splitting the solution into two different portions are investigated. In order to avoid ions transport resistance phenomena and other complications that are present in electrical coupling experiments, we used the spectrophotometric method 14 instead of the electrochemical method. bAddress for correspondence: 39-079-229555 (voice); branca@ssmain.uniss.it (e-mail).…”

Section: Introductionmentioning

confidence: 99%