Application of a distributed impedance model in the analysis of conducting polymer films

Bisquert, Juan; Belmonte, G. Garcia; Fabregat‐Santiago, Francisco; Ferriols, Noemı́ S.; Yamashita, Miyuki; Pereira, Ernesto C.

doi:10.1016/s1388-2481(00)00089-8

Cited by 104 publications

(68 citation statements)

References 21 publications

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“…In this way, the metal oxides may be viewed as mixed ionic/electronic conductors similar to electroactive redox and conducting polymers. The physical transport processes within the material may be described in terms of a dual rail electrical transmission line, [236][237][238][239][240] a general schematic of which is presented in Fig. 14.…”

Section: Charge Transport In Transition Metal Oxidesmentioning

confidence: 99%

“…At the simplest level Z corresponds to the electronic resistance R E , X to the ionic resistance R I , and Y to a distributed capacitance C S . The application of this type of circuit has been discussed in detail by Bisquert and coworkers [236][237][238] in relation to electronically conducting polymers and transition metal oxide materials.…”

Section: Charge Transport In Transition Metal Oxidesmentioning

confidence: 99%

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Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

Doyle

Godwin

Brandon

et al. 2013

Phys. Chem. Chem. Phys.

525

565

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This paper presents a review of the redox and electrocatalytic properties of transition metal oxide electrodes, paying particular attention to the oxygen evolution reaction. Metal oxide materials may be prepared using a variety of methods, resulting in a diverse range of redox and electrocatalytic properties. Here we describe the most common synthetic routes and the important factors relevant to their preparation. The redox and electrocatalytic properties of the resulting oxide layers are ascribed to the presence of extended networks of hydrated surface bound oxymetal complexes termed surfaquo groups. This interpretation presents a possible unifying concept in water oxidation catalysis -bridging the fields of heterogeneous electrocatalysis and homogeneous molecular catalysis. In contextOver the past 50 years considerable research efforts have been devoted to the realisation of efficient, economical and renewable energy sources. Metal oxide materials have played a large part in this drive with demonstrated applications at both the research and commercial level. Their use in areas such as batteries, fuel cells and water electrolysis has resulted in the development of materials with a diverse range of structural and chemical properties. In all cases, understanding the fundamental electrochemistry of the material can be invaluable for rational design and optimisation. This review focuses on the redox, charge transport and electrocatalytic properties of transition metal oxide electrodes as they pertain to the electrolytic splitting of water. Particular emphasis is placed on the nature of the active surface which is interpreted in terms of hydrated interlinked oxymetal complexes termed surfaquo groups. In this way, the review seeks to bridge the gap between heterogeneous electrocatalysis and homogeneous molecular catalysis for water oxidation, areas of considerable modern interest and activity.

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Section: Charge Transport In Transition Metal Oxidesmentioning

confidence: 99%

Section: Charge Transport In Transition Metal Oxidesmentioning

confidence: 99%

Redox and electrochemical water splitting catalytic properties of hydrated metal oxide modified electrodes

Doyle

Godwin

Brandon

et al. 2013

Phys. Chem. Chem. Phys.

525

565

View full text Add to dashboard Cite

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“…Therefore, the analysis of the features of the distributed impedance model in previous works 15,36 could be applied to the diffusion-recombination model with the reflecting boundary condition developed here.…”

Section: Appendix 2 Degeneracy Of Impedance Models Involving Transportmentioning

confidence: 99%

Theory of the Impedance of Electron Diffusion and Recombination in a Thin Layer

2001

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This paper analyzes the small signal ac impedance of electron diffusion and recombination in a spatially restricted situation with application in systems such as porous TiO 2 nanostructured photoelectrodes and intrinsically conducting polymers. It is shown that the diffusion-recombination model with the main types of boundary conditions assumes a finite set of possible behaviors in the frequency domain, which are classified according to relevant physical parameters. There are four possible cases: (i) the impedance of finite diffusion with reflecting boundary, (ii) the impedance of finite diffusion with absorbing boundary, (iii) the impedance of diffusion-reaction in semiinfinite space or Gerischer impedance, and (iv) the impedance that combines Warburg response at high frequency and a reaction arc at low frequency. The generality of the approach is discussed in terms of the spatial distribution of the electrochemical potential or quasi-Fermi level and also in terms of the transmission line representation. An extension is considered to the diffusion in lithium intercalation electrodes coupled to a homogeneous solid-state reaction. The connection is established with other frameworks for the description of transport and reaction in electrochemical systems.

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“…This resource is a very useful tool to develop models due to the great number of facilities available to study electrical circuits (they are easy to study in different steps or modules). Such models are employed in engineering and physics, or in electrochemistry in order to explain the capacitive behaviour of CP (Albery & Mount 1993;Albery & Mount 1994;Bisquert et al 2000;Buck & Mundt 1999;Paasch 2000;Vorotyntsev et al 1994). Ren and Pickup (Ren & Pickup 1997) proposed equivalent electrical circuits to model the electron transport and electron transfer in composite pPy-PSS films based on the works of Albery.…”

Section: Equivalent Transmission Line Modelmentioning

confidence: 99%