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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Banerjee, Aayan
University of Twente
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2023Modelling of the catalytic initiation of methane coupling under non-oxidative conditionscitations
- 2022Non-equilibrium thermodynamics of mixed ionic-electronic conductive electrodes and their interfacescitations
- 2017Elementary kinetics of the oxygen reduction reaction on LSM-YSZ composite cathodescitations
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article
Non-equilibrium thermodynamics of mixed ionic-electronic conductive electrodes and their interfaces
Abstract
<p>Non-equilibrium thermodynamics describe the current-voltage characteristics of electrochemical devices. For conventional electrode-electrolyte interfaces, the local activation overpotential is used to describe the electrostatic potential step between the two materials as a current is generated. However, the activation overpotential for the metal/mixed ionic-electronic conducting (MIEC) composite electrodes studied in this work originates at the MIEC-gas interface. Moreover, we have studied the effects of non-equilibrium on the electrostatic surface potential and evaluated its influence over electrode kinetics. By investigating two phase (2PB) and three phase boundary (3PB) reactions at the Ni/Ce<sub>1−x</sub>Gd<sub>x</sub>O<sub>2−δ</sub> (Ni/CGO) electrode, we have demonstrated that the driving force for coupled ion-electron transfer is held at the CGO-gas interface for both reaction pathways. We also determined that the rate of coupled ion-electron transfer via the 3PB scales with the availability of free sites on the metallic surface, revealing a Sabatier-like relationship with regards to the selection of metallic phases. Finally, we demonstrated how the theory of the electrostatic surface potential can be applied to other systems outside of the well-studied H<sub>2</sub>/H<sub>2</sub>O electrode environment. These findings therefore provide an insight into the design of future electrode structures for a range of electrochemical devices.</p>