Catalysis of the electrochemical processes on solid oxide fuel cell cathodes

Erning, Johann Wilhelm; Hauber, T.; Stimming, Ulrich; Wippermann, Klaus

doi:10.1016/s0378-7753(96)02358-0

Cited by 60 publications

(39 citation statements)

References 4 publications

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“…[128] Erning et al reported similar enhancements through the addition of Pd. [129] However, Haanappel and coworkers reported that neither Pd nor Pt had any effect on the performance of LSM cathodes. [130] although a second study from the Julich group on Pd doping of Pr 0.7 Sr 0.3 Fe 0.8 Co 0.2 O 3 did show enhancements.…”

Section: Infiltration To Enhance Electrode Performancementioning

confidence: 99%

High‐Performance SOFC Cathodes Prepared by Infiltration

2009

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Improved cathodes are required for low‐temperature operation of solid‐oxide fuel cells (SOFCs). Recent work has shown that electrode fabrication and modification by infiltration of active components into a porous scaffold can result in outstanding electrochemical performance. In this paper we review the literature on this new approach for cathode preparation and discuss the insights that this work has provided for understanding the relationships between the materials properties, electrochemical performance, and electrode stability.

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Section: Infiltration To Enhance Electrode Performancementioning

confidence: 99%

High‐Performance SOFC Cathodes Prepared by Infiltration

2009

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“…Oxygen activation is the basis of the processes occurring in a porous SOFC cathode (or in the porous electrode of symmetrical cells) involving [27,28,29,30,31]: oxygen diffusion through porous cathodes, adsorption of molecular oxygen on the cathode catalyst surface, reduction of molecular oxygen into different oxygen ionic species on cathode surface entailing electron transfer, oxygen ion incorporation into the bulk, transport of oxygen ion or molecular adsorbed oxygen from the cathode surface to the electrolyte interface and transfer from the interface to the electrolyte bulk. EIS experimental data were recorded for each material and temperature and the polarization contributions were modelled as two arcs in the negative imaginary part of Nyquist (Cole-Cole) plot (see [32] and Supplementary Material for more detailed explanation).…”

Section: Eis Characterization Resultsmentioning

confidence: 99%

Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Vert

Serra

2010

Fuel Cells

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Active perovskite‐based SOFC cathodes have been developed through lanthanide combination in the (La1 – x – yPrxSmy)0.58Sr0.4Fe0.8Co0.2O3 – δ system following a ternary mixture experimental design. These compositions were prepared through a sol–gel method and characterised by electrochemical impedance spectroscopy (EIS) as symmetrical cells on GDC‐electrolyte samples in the 450–650 °C temperature range. The electrochemical properties of the single lanthanide‐based Ln0.58Sr0.4Fe0.8Co0.2O3 – δ compounds were enhanced when different lanthanides were combined together in the same crystalline structure. The observed improvement does not follow a mere additional effect of the performance from the parent Ln0.58Sr0.4Fe0.8Co0.2O3 – δ compounds, i.e. it does not follow a linear behaviour, and the better performance is ascribed to synergetic catalytic effects among lanthanide cations. A reduction in electrode polarisation resistance with respect to non‐substituted compositions is stated for most Ln0.58Sr0.4Fe0.8Co0.2O3 – δ electrode compositions combining two or three lanthanides. Samarium addition to the electrode material involves a substantial reduction in the activation energy and the reduction degree is directly dependant on the samarium amount incorporated in the lattice. The best performing composition comprises a praseodymium‐rich lanthanum‐based electrode material. The experimental data derived from the ternary mixture design were modelled using nonlinear functions and this modelling allowed finding an electrode composition minimising the polarisation resistance while maintaining the activation energy at reduced values. Selected cathode compositions were tested in fully assembled anode‐supported cells and electrochemical characterisation supports the cooperative effect of lanthanide combination.

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“…In general, the performance of the anode OER process needs to be improved and one method of improving OERs is the addition of noble metals such as Pd, Pt or Ag to the anode. However, the catalytic effects of the addition of small amounts of noble metals have not been explored much and very few literature sources are available [212][213][214].…”

Section: Noble Metal Catalystsmentioning

confidence: 99%

“…And in one of the few sources addressing the addition of a small amount of noble metal to form catalysts, Erning et al [212] reported that the addition of small amounts of palladium (Pd) can activate the catalytic process in which the addition of small amounts of Pd (0.1 mg cm −2 ) to La 0.84 Sr 0.6 MnO 3 (LSM) was found to decrease the activation energy from 200 to 100 kJ mol −1 . However, this study was conducted on an SOFC rather than on an SOEC.…”

Section: Noble Metal Catalystsmentioning

confidence: 99%

Recent Progresses in Electrocatalysts for Water Electrolysis

Khan

Zhao

Zou

et al. 2018

Electrochem. Energ. Rev.

362

178

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The study of hydrogen evolution reaction and oxygen evolution reaction electrocatalysts for water electrolysis is a developing field in which noble metal-based materials are commonly used. However, the associated high cost and low abundance of noble metals limit their practical application. Non-noble metal catalysts, aside from being inexpensive, highly abundant and environmental friendly, can possess high electrical conductivity, good structural tunability and comparable electrocatalytic performances to state-of-the-art noble metals, particularly in alkaline media, making them desirable candidates to reduce or replace noble metals as promising electrocatalysts for water electrolysis. This article will review and provide an overview of the fundamental knowledge related to water electrolysis with a focus on the development and progress of non-noble metal-based electrocatalysts in alkaline, polymer exchange membrane and solid oxide electrolysis. A critical analysis of the various catalysts currently available is also provided with discussions on current challenges and future perspectives. In addition, to facilitate future research and development, several possible research directions to overcome these challenges are provided in this article.

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Catalysis of the electrochemical processes on solid oxide fuel cell cathodes

Cited by 60 publications

References 4 publications

High‐Performance SOFC Cathodes Prepared by Infiltration

High‐Performance SOFC Cathodes Prepared by Infiltration

Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Recent Progresses in Electrocatalysts for Water Electrolysis

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Catalysis of the electrochemical processes on solid oxide fuel cell cathodes

Cited by 60 publications

References 4 publications

High‐Performance SOFC Cathodes Prepared by Infiltration

High‐Performance SOFC Cathodes Prepared by Infiltration

Improvement of the Electrochemical Performance of Ln0.58Sr0.4Fe0.8Co0.2O3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)

Recent Progresses in Electrocatalysts for Water Electrolysis

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Improvement of the Electrochemical Performance of Ln_0.58Sr_0.4Fe_0.8Co_0.2O_3 – δ IT‐SOFC Cathodes by Ternary Lanthanide Combinations (La‐Pr‐Sm)