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Romano RL, Damaceno LP, Magalhães DV, Parmananda P, Varela H. Electrical coupling of individual electrocatalytic oscillators. CHAOS (WOODBURY, N.Y.) 2022; 32:083139. [PMID: 36049927 DOI: 10.1063/5.0098339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
The catalytic electro-oxidation of some small organic molecules is known to display kinetic instabilities, which reflect on potential and/or current oscillations. Under oscillatory conditions, those systems can be considered electrocatalytic oscillators and, therefore, can be described by their amplitude, frequency, and waveform. Just like mechanical oscillators, the electrocatalytic ones can be coupled and their dynamics can be changed by setting different coupling parameters. In the present work, we study the unidirectional coupling of electrocatalytic oscillators, namely, those comprehending the catalytic electro-oxidation of methanol and formic acid on polycrystalline platinum in acidic media under potentiostatic control. Herein, we explore two different scenarios (the coupling of compositionally identical and non-identical oscillators) and investigate the effects of the master's identity and of the coupling constant on the slave's dynamics. For the master (methanol)-slave (methanol) coupling, the oscillators exhibited phase lag synchronization and complete phase synchronization. On the other hand, for the master (formic acid)-slave (methanol) coupling, the oscillators exhibited complete phase synchronization with phase-locking with a 2:3 ratio, complete phase synchronization with phase-locking with a 1:2 ratio, phase lag synchronization, and complete phase synchronization. The obtained results suggest that both the master's identity and the coupling constant (sign and magnitude) are parameters that play an important role on the coupled systems, in such a way that even for completely different systems, synchronization could emerge by setting a suitable coupling constant. To the best of our knowledge, this is the first report concerning the electrical coupling of hidden N-shaped-negative differential resistance type systems.
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Affiliation(s)
- R L Romano
- São Carlos Institute of Chemistry, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - L P Damaceno
- Department of Mechanical Engineering, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - D V Magalhães
- Department of Mechanical Engineering, University of São Paulo, 13560-970 São Carlos, SP, Brazil
| | - P Parmananda
- Department of Physics, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
| | - H Varela
- São Carlos Institute of Chemistry, University of São Paulo, 13560-970 São Carlos, SP, Brazil
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da Silva KN, Sitta E. Oscillatory dynamics during the methanol electrooxidation reaction on Pt(111). Phys Chem Chem Phys 2021; 23:22263-22272. [PMID: 34644370 DOI: 10.1039/d1cp02490f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite several papers describing the oscillatory methanol electrooxidation reaction (OMOR) catalyzed by polycrystalline Pt, these dynamic instabilities are less explored on single crystalline surfaces. Herein, we observed and mapped for the first time the OMOR on Pt(111) in non-adsorbing anion solutions as well as in the presence of small amounts of sulfate anions. Period 1 oscillations with oscillation frequencies from 1.2 to 2.0 Hz were observed for methanol concentrations higher than 1.0 M, with no evolution to more complex patterns. These oscillations occur in the potential range in which PtOH is partially covering the surface without irreversible oxidation processes. Small changes in both the mean potential (Em) and the poisoning rate along the time-series were observed, the so-called drift, and were explained in terms of the accumulation of intermediates at the interface. The presence of sulfate strongly inhibits the OMOR, and the results are discussed in terms of sulfate adlayer formation on {111} domains.
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Affiliation(s)
- Kaline Nascimento da Silva
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil.
| | - Elton Sitta
- Chemistry Department, Federal University of Sao Carlos, Rod. Washington Luis, km 235, Sao Carlos, 13565-905, Brazil. .,Center for Innovation on New Energies, Campinas, 13083-841, Brazil
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Silva MF, Delmonde MV, Batista BC, Boscheto E, Varela H, Camara GA. Oscillatory electro-oxidation of ethanol on platinum studied by in situ ATR-SEIRAS. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Previdello BAF, Fernández PS, Tremiliosi-Filho G, Varela H. Probing the surface fine structure through electrochemical oscillations. Phys Chem Chem Phys 2018; 20:5674-5682. [PMID: 29424846 DOI: 10.1039/c7cp08028j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In the course of (electro)catalytic reactions, reversible and irreversible changes, namely the formation of adsorbed poisons, catalyst degradation, surface roughening, etc., take place at distinct time-scales. Reading the transformations on the catalyst surface from the measurement of the reaction rates is greatly desirable but generally not feasible. Herein, we study the effect of random surface defects on Pt(100) electrodes toward the electro-oxidation of methanol in acidic media. The surface defects are gently generated in situ and their relative magnitudes are reproducibly controlled. The system was characterized under conventional conditions and investigated under an oscillatory regime. Oscillatory patterns were selected according to the presence of surface defects, and a continuous transition from large amplitude/low frequency oscillations (type L) on smooth surfaces to small amplitude/high frequency oscillations (type S) on disordered surfaces was observed. Importantly, self-organized potential oscillations were found to be much more sensitive to the surface structure than conventional electrochemical signatures or even other in situ characterization methods. As a consequence, we proved the possibility of following the surface fine structure in situ and in a non-invasive manner by monitoring the temporal evolution of oscillatory patterns. From a mechanistic point of view, we describe the role played by surface defects and of the adsorbed and partially oxidized, dissolved species on the oscillations of type S and L.
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Affiliation(s)
- B A F Previdello
- Institute of Chemistry of São Carlos, University of São Paulo, P.O. Box 780, 13560-970, São Carlos, SP, Brazil.
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Antonopoulos I, Karantonis A. Electrochemistry of copper in methanolic solutions: Anodic oxidation and fabrication of hydrophobic surfaces. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.04.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Microwave-Assisted Synthesis of Pt-Au Nanoparticles with Enhanced Electrocatalytic Activity for the Oxidation of Formic Acid. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2016.12.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Previdello BAF, Fernández PS, Tremiliosi-Filho G, Varela H. Oscillatory Electro-oxidation of Methanol on Platinum Single Crystal Electrodes. Electrocatalysis (N Y) 2016. [DOI: 10.1007/s12678-016-0317-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Transient chaotic behavior during simultaneous occurrence of two electrochemical oscillations. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2813-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nascimento MA, Nagao R, Eiswirth M, Varela H. Coupled slow and fast surface dynamics in an electrocatalytic oscillator: Model and simulations. J Chem Phys 2014; 141:234701. [DOI: 10.1063/1.4903172] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Melke A. Nascimento
- Institute of Chemistry of São Carlos, University of São Paulo, PO Box 780, 13560-970, São Carlos, SP, Brazil
- Fritz Haber Institute of the Max Planck Society, Department of Physical Chemistry, Faradayweg 4-6, D-14195 Berlin, Germany
| | - Raphael Nagao
- Institute of Chemistry of São Carlos, University of São Paulo, PO Box 780, 13560-970, São Carlos, SP, Brazil
| | - Markus Eiswirth
- Fritz Haber Institute of the Max Planck Society, Department of Physical Chemistry, Faradayweg 4-6, D-14195 Berlin, Germany
- Ertl Center for Electrochemistry and Catalysis, GIST, Cheomdan-gwagiro 261, Buk-gu, Gwangju 500-712, South Korea
| | - Hamilton Varela
- Institute of Chemistry of São Carlos, University of São Paulo, PO Box 780, 13560-970, São Carlos, SP, Brazil
- Fritz Haber Institute of the Max Planck Society, Department of Physical Chemistry, Faradayweg 4-6, D-14195 Berlin, Germany
- Ertl Center for Electrochemistry and Catalysis, GIST, Cheomdan-gwagiro 261, Buk-gu, Gwangju 500-712, South Korea
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Perini N, Batista BC, Angelo ACD, Epstein IR, Varela H. Long-Lasting Oscillations in the Electro-Oxidation of Formic Acid on PtSn Intermetallic Surfaces. Chemphyschem 2014; 15:1753-60. [DOI: 10.1002/cphc.201301186] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Indexed: 11/12/2022]
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MUKOUYAMA Y, YONEZAWA S, TAGUCHI R, GOJUKI T, KUGE T, OKAMOTO H. Regeneration Oscillation Observed during Oxidation of Methanol, Formic Acid, and Formaldehyde with Chloride Ions. ELECTROCHEMISTRY 2014. [DOI: 10.5796/electrochemistry.82.960] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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MUKOUYAMA Y, FURUYAMA O, BUNDO Y, OKAMOTO H. Separate Current Range for Appearance of Potential Oscillation during Methanol Oxidation on Platinum. ELECTROCHEMISTRY 2014. [DOI: 10.5796/electrochemistry.82.573] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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The electro-oxidation of ethylene glycol on platinum over a wide pH range: oscillations and temperature effects. PLoS One 2013; 8:e75086. [PMID: 24058650 PMCID: PMC3776735 DOI: 10.1371/journal.pone.0075086] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 08/09/2013] [Indexed: 11/19/2022] Open
Abstract
We report a comprehensive study of the electro-oxidation of ethylene glycol (EG) on platinum with emphasis on the effects exerted by the electrolyte pH, the EG concentration, and temperature, under both regular and oscillatory conditions. We extracted and discussed parameters such as voltammetric activity, reaction orders (with respect to [EG]), oscillation's amplitude, frequency and waveform, and the evolution of the mean electrode potential at six pH values from 0 to 14. In addition, we obtained the apparent activation energies under several different conditions. Overall, we observed that increasing the electrolyte pH results in a discontinuous transition in most properties studied under both voltammetric and oscillatory regimes. As a relevant result in this direction, we found that the increase in the reaction order with pH is mediated by a minimum (~ 0) at pH = 12. Furthermore, the solution pH strongly affects all features investigated, c.f. the considerable increase in the oscillatory frequency and the decrease in the, oscillatory, activation energy as the pH increase. We suggest that adsorbed CO is probably the main surface-blocking species at low pH, and its absence at high pH is likely to be the main reason behind the differences observed. The size of the parameter region investigated and the amount of comparable parameters and properties presented in this study, as well as the discussion that followed illustrate the strategy of combining investigations under conventional and oscillatory regimes of electrocatalytic systems.
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Cabral MF, Nagao R, Sitta E, Eiswirth M, Varela H. Mechanistic aspects of the linear stabilization of non-stationary electrochemical oscillations. Phys Chem Chem Phys 2013; 15:1437-42. [PMID: 23165655 DOI: 10.1039/c2cp42890c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Murilo F Cabral
- Institute of Chemistry of Sao Carlos, University of Sao Paulo, P.O. Box 780, ZIP 13560-970, Sao Carlos, SP, Brazil
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15
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Oliveira CP, Lussari NV, Sitta E, Varela H. Oscillatory electro-oxidation of glycerol on platinum. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.08.087] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Nagao R, Cantane DA, Lima FHB, Varela H. The dual pathway in action: decoupling parallel routes for CO2 production during the oscillatory electro-oxidation of methanol. Phys Chem Chem Phys 2012; 14:8294-8. [PMID: 22395562 DOI: 10.1039/c2cp00037g] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As in the case of most small organic molecules, the electro-oxidation of methanol to CO(2) is believed to proceed through a so-called dual pathway mechanism. The direct pathway proceeds via reactive intermediates such as formaldehyde or formic acid, whereas the indirect pathway occurs in parallel, and proceeds via the formation of adsorbed carbon monoxide (CO(ad)). Despite the extensive literature on the electro-oxidation of methanol, no study to date distinguished the production of CO(2) from direct and indirect pathways. Working under, far-from-equilibrium, oscillatory conditions, we were able to decouple, for the first time, the direct and indirect pathways that lead to CO(2) during the oscillatory electro-oxidation of methanol on platinum. The CO(2) production was followed by differential electrochemical mass spectrometry and the individual contributions of parallel pathways were identified by a combination of experiments and numerical simulations. We believe that our report opens some perspectives, particularly as a methodology to be used to identify the role played by surface modifiers in the relative weight of both pathways-a key issue to the effective development of catalysts for low temperature fuel cells.
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Affiliation(s)
- Raphael Nagao
- Institute of Chemistry of São Carlos, University of São Paulo CP 780, CEP 13560-970, São Carlos, SP, Brazil
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Krewer U, Vidakovic-Koch T, Rihko-Struckmann L. Electrochemical Oxidation of Carbon-Containing Fuels and Their Dynamics in Low-Temperature Fuel Cells. Chemphyschem 2011; 12:2518-44. [PMID: 21755584 DOI: 10.1002/cphc.201100095] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Indexed: 11/09/2022]
Affiliation(s)
- Ulrike Krewer
- Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, Germany.
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Boscheto E, Batista B, Lima R, Varela H. A surface-enhanced infrared absorption spectroscopic (SEIRAS) study of the oscillatory electro-oxidation of methanol on platinum. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.01.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sitta E, Nascimento MA, Varela H. Complex kinetics, high frequency oscillations and temperature compensation in the electro-oxidation of ethylene glycol on platinum. Phys Chem Chem Phys 2010; 12:15195-206. [PMID: 20661518 DOI: 10.1039/c002574g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Elton Sitta
- Instituto de Química de São Carlos, Universidade de São Paulo C.P. 780, CEP 13560-970, São Carlos, SP, Brazil
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22
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Carbonio EA, Nagao R, Gonzalez ER, Varela H. Temperature effects on the oscillatory electro-oxidation of methanol on platinum. Phys Chem Chem Phys 2009; 11:665-70. [PMID: 19835088 DOI: 10.1039/b811636a] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Emilia A Carbonio
- Instituto de Química de São Carlos, Universidade de São Paulo, C.P. 780, CEP: 13560-970 São Carlos, SP, Brasil
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23
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Kikuchi M, Mukouyama Y, Okamoto H. Chloride ion influencing potential oscillation generated by formaldehyde oxidation. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.05.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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24
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Okamoto H, Kikuchi M, Mukouyama Y. Effect of chloride ions on potential oscillation generated by formic acid oxidation. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.04.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Zhao G, Tang Y, Chen R, Geng R, Li D. Potential and current oscillations during formaldehyde oxidation on platinum particles dispersed in three-dimensional pore networks of TiOx/Ti. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.02.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Kikuchi M, Kon W, Miyahara S, Mukouyama Y, Okamoto H. Potential oscillation generated by formaldehyde oxidation in the presence of dissolved oxygen. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.07.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Buchachenko AL. Chemistry on the border of two centuries — achievements and prospects. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1999v068n02abeh000487] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Okamoto H, Kon W, Mukouyama Y. Five current peaks in voltammograms for oxidations of formic acid, formaldehyde, and methanol on platinum. J Phys Chem B 2007; 109:15659-66. [PMID: 16852984 DOI: 10.1021/jp0516036] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have found that five current peaks are present in the voltammograms in the positive and negative sweep directions for the oxidations of formic acid, formaldehyde, and methanol on Pt in the potential range of 0.05-1.8 V, although the experimental conditions for the peaks to appear are different. In particular, a current peak at ca. 0.6 V, the negative slope of which on the positive side is closely related to autocatalysis, inducing oscillation, has been observed even for methanol. We have clarified that the three substances produce very similar voltammograms at a very slow sweep rate, such as 0.1 mV/s, and show some of the same behaviors of the peaks in their voltammograms. All these facts support the idea that the electrochemical oxidation mechanisms for the three substances have the same dominating elementary reaction steps, which induce oscillation phenomena, although with different reaction and adsorption rate constants.
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Affiliation(s)
- Hiroshi Okamoto
- Department of Natural Sciences, College of Science and Engineering, Tokyo Denki University, Hatoyama, Saitama 350-0394, Japan.
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29
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On the open-circuit interaction between methanol and oxidized platinum electrodes. J Solid State Electrochem 2007. [DOI: 10.1007/s10008-007-0349-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bromide ions induced chaotic behavior in H2O2–H2SO4–Pt electrochemical system. J Solid State Electrochem 2004. [DOI: 10.1007/s10008-004-0609-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Kim KR, Shin KJ, Lee DJ. Complex oscillations in a simple model for the Briggs-Rauscher reaction. J Chem Phys 2004; 121:2664-72. [PMID: 15281867 DOI: 10.1063/1.1711591] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Complex oscillations in a simple model of the Briggs-Rauscher reaction mechanism in a continuously stirred tank reactor proposed by Kim et al. [J. Chem. Phys. 117, 2710 (2002)] are investigated numerically. The k(0)-[CH(2)(COOH)(2)](0) phase diagram is constructed first where k(0) is the flow rate and [...](0) is the input concentration. Within the region surrounded by the Hopf bifurcation curve, we find complex oscillation regions which are again separated from the regular oscillation region by the secondary Hopf bifurcation curves. Mixed mode oscillations with an incomplete Farey sequence, periodic-chaotic (or nonperiodic) sequence, and various types of burst oscillations are observed in complex oscillation regions. Also, chaotic burst oscillations, which are due to the transition from one kind of burst to another kind, are reported.
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Affiliation(s)
- Kyoung-Ran Kim
- School of Chemistry, Seoul National University, Seoul 151-747, Korea
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Mishina E, Karantonis A, Yu QK, Nakabayashi S. Optical Second Harmonic Generation during the Electrocatalytic Oxidation of Formaldehyde on Pt(111): Potentiostatic Regime versus Galvanostatic Potential Oscillations. J Phys Chem B 2002. [DOI: 10.1021/jp026146x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elena Mishina
- Department of Chemistry, Faculty of Science, Saitama University, Saitama 338-8570, Japan, and Moscow Institute of Radioengineering, Electronics and Automation, prosp. Vernadskogo 78, 117454 Moscow, Russia
| | - Antonis Karantonis
- Department of Chemistry, Faculty of Science, Saitama University, Saitama 338-8570, Japan, and Moscow Institute of Radioengineering, Electronics and Automation, prosp. Vernadskogo 78, 117454 Moscow, Russia
| | - Qing-Kai Yu
- Department of Chemistry, Faculty of Science, Saitama University, Saitama 338-8570, Japan, and Moscow Institute of Radioengineering, Electronics and Automation, prosp. Vernadskogo 78, 117454 Moscow, Russia
| | - Seiichiro Nakabayashi
- Department of Chemistry, Faculty of Science, Saitama University, Saitama 338-8570, Japan, and Moscow Institute of Radioengineering, Electronics and Automation, prosp. Vernadskogo 78, 117454 Moscow, Russia
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Lee J, Christoph J, Strasser P, Eiswirth M, Ertl G. Spatio-temporal interfacial potential patterns during the electrocatalyzed oxidation of formic acid on Bi-modified Pt. J Chem Phys 2001. [DOI: 10.1063/1.1379535] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Mukouyama Y, Nakanishi S, Chiba T, Murakoshi K, Nakato Y. Mechanisms of Two Electrochemical Oscillations of Different Types, Observed for H2O2 Reduction on a Pt Electrode in the Presence of a Small Amount of Halide Ions. J Phys Chem B 2001. [DOI: 10.1021/jp0104381] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yoshiharu Mukouyama
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Shuji Nakanishi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Takehiro Chiba
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kei Murakoshi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yoshihiro Nakato
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Tanaka N, Okamoto H, Naito M. Estimating the amplitude of measurement noise present in chaotic time series. CHAOS (WOODBURY, N.Y.) 1999; 9:436-444. [PMID: 12779840 DOI: 10.1063/1.166418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We propose a method for estimating the amplitude of measurement noise present in chaotic time series. This method is based on the evaluation of initial errors for a given time series and for a new one synthesized by adding an adequate amount of noise to the given one. The method is valid over a much wider range of noise levels than the previous methods are because it is not based on the detail of dynamical structure which generates the data. In addition, it is possible to check if the method is valid for the given data prior to its application. To confirm the effectiveness of the method we show the results of numerical experiments and apply the method to chaotic data obtained from an electrochemical experiment. (c) 1999 American Institute of Physics.
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Affiliation(s)
- Naoki Tanaka
- Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama, 350-0395, Japan
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38
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Okamoto H, Tanaka N, Naito M. Intermittencies and Related Phenomena in the Oxidation of Formaldehyde at a Constant Current. J Phys Chem A 1998. [DOI: 10.1021/jp981293+] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Okamoto H, Tanaka N, Naito M. Chaotic and Periodic Potential Oscillations in Formaldehyde Oxidation. J Phys Chem A 1998. [DOI: 10.1021/jp981292h] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroshi Okamoto
- Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan
| | - Naoki Tanaka
- Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan
| | - Masayoshi Naito
- Advanced Research Laboratory, Hitachi, Ltd., Hatoyama, Saitama 350-0395, Japan
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