| People | Locations | Statistics |
|---|---|---|
| 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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Chatzichristodoulou, Christodoulos
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2024Operando Electron Microscopy and Impedance Analysis of Solid Oxide Electrolysis and Fuel Cellscitations
- 2021Development of high-temperature electrochemical TEM and its application on solid oxide electrolysis cells
- 2021Development of high-temperature electrochemical TEM and its application on solid oxide electrolysis cells
- 2020Polysulfone-polyvinylpyrrolidone blend membranes as electrolytes in alkaline water electrolysiscitations
- 2020(Invited) Advanced Alkaline Electrolysis Cells for the Production of Sustainable Fuels and Chemicals
- 2017Oxygen transport properties of tubular Ce 0.9 Gd 0.1 O 1.95 -La 0.6 Sr 0.4 FeO 3−d composite asymmetric oxygen permeation membranes supported on magnesium oxidecitations
- 2017Ionic/Electronic Conductivity, Thermal/Chemical Expansion and Oxygen Permeation in Pr and Gd Co-Doped Ceria PrxGd0.1Ce0.9-xO1.95-δcitations
- 2017Chemical and Electrochemical Properties of La0.58Sr0.4Fe0.8Co0.2O3-δ (LSCF) Thin Films upon Oxygen Reduction and Evolution Reactions
- 2017Oxygen transport properties of tubular Ce0.9Gd0.1O1.95-La0.6Sr0.4FeO3−d composite asymmetric oxygen permeation membranes supported on magnesium oxidecitations
- 2016Relaxation of stresses during reduction of anode supported SOFCs
- 2016High Temperature and Pressure Alkaline Electrochemical Reactor for Conversion of Power to Chemicals
- 2016Evolution of the electrochemical interface in high-temperature fuel cells and electrolyserscitations
- 2016Design and optimization of porous ceramic supports for asymmetric ceria-based oxygen transport membranescitations
- 2016Design and optimization of porous ceramic supports for asymmetric ceria-based oxygen transport membranescitations
- 2016New Hypothesis for SOFC Ceramic Oxygen Electrode Mechanismscitations
- 2016High Temperature Alkaline Electrolysis Cells with Metal Foam Based Gas Diffusion Electrodescitations
- 2015Size of oxide vacancies in fluorite and perovskite structured oxidescitations
- 2015Need for In Operando Characterization of Electrochemical Interface Features
- 2015Kinetics of CO/CO 2 and H 2 /H 2 O reactions at Ni-based and ceria-based solid-oxide-cell electrodescitations
- 2014Composite Fe - BaCe0.2Zr0.6Y0.2O2.9 Anodes for Proton Conductor Fuel Cellscitations
- 2014Composite Fe - BaCe 0.2 Zr 0.6 Y 0.2 O 2.9 Anodes for Proton Conductor Fuel Cellscitations
- 2014Power to fuel using electrolysis and CO2 capture
- 2014TOF-SIMS characterization of impurity enrichment and redistribution in solid oxide electrolysis cells during operationcitations
- 2014High performance and highly durable infiltrated cathodes using Pr-modified Ce0.9Gd0.1O1.95 backbone
- 2014High performance and highly durable infiltrated cathodes using Pr-modified Ce 0.9 Gd 0.1 O 1.95 backbone
- 2013Defect chemistry, thermomechanical and transport properties of (RE2−xSrx)0.98(Fe0.8Co0.2)1−yMgyO4−δ (RE = La, Pr)citations
- 2013Pressurized HxCyOz Cells at ca. 250 °C: Potential and Challenges
- 2013Infiltration of ionic-, electronic- and mixed-conducting nano particles into La0.75Sr0.25MnO3–Y0.16Zr0.84O2 cathodes – A comparative study of performance enhancement and stability at different temperaturescitations
- 2013High temperature and pressure alkaline electrolysis
- 2013Alkaline electrolysis cell at high temperature and pressure of 250 °C and 42 barcitations
- 2013Pressurized H x C y O z Cells at ca. 250 °C: Potential and Challenges
- 2013Defect chemistry, thermomechanical and transport properties of (RE 2 - x Sr x ) 0.98 (Fe 0.8 Co 0.2 ) 1 - y Mg y O 4 - δ (RE = La, Pr)citations
- 2013Infiltration of ionic-, electronic- and mixed-conducting nano particles into La 0.75 Sr 0.25 MnO 3 –Y 0.16 Zr 0.84 O 2 cathodes – A comparative study of performance enhancement and stability at different temperaturescitations
- 2012Characterization of impregnated GDC nano structures and their functionality in LSM based cathodescitations
- 2011Evaluation of thin film ceria membranes for syngas membrane reactors—Preparation, characterization and testingcitations
- 2010Oxygen Nonstoichiometry and Defect Chemistry Modeling of Ce0.8Pr0.2O2-deltacitations
- 2010Defect Chemistry and Thermomechanical Properties of Ce0.8PrxTb0.2-xO2-deltacitations
Places of action
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article
(Invited) Advanced Alkaline Electrolysis Cells for the Production of Sustainable Fuels and Chemicals
Abstract
<jats:p>Amongst the different electrolysis technologies, alkaline electrolysis (AE) stands out as the most well established for large-scale electrolytic hydrogen production, with commercially available multi-MW units combined in plants of 100s of MW and operated for decades. Besides proven reliability and availability, a key advantage of AE over alternative technologies when it comes to large-scale deployment is the relatively abundant and inexpensive materials it relies on. Nevertheless, AE suffers from relatively poor performance in terms of production rate and efficiency when compared to proton exchange membrane electrolysis (PEME) and solid oxide electrolysis (SOE).</jats:p><jats:p>One of the main reasons is associated with the sluggish hydrogen evolution reaction (HER) kinetics in alkaline environment [1]. Recent improvements in HER catalysts, have reduced the HER kinetics difference between alkaline and acidic environment. Furthermore, the far lower price of these catalysts (e.g. Ni, Ni<jats:sub>1-x</jats:sub>Mo<jats:sub>x</jats:sub>) compared to Pt, allow for much higher catalyst loadings, which can circumvent this challenge in conjunction with the much higher ionic conductivity of concentrated aqueous KOH as compared to PEME and SOE electrolytes. Taking full advantage of this opportunity requires a careful optimization of the AE electrode microstructure to achieve both a high electrochemically active surface area in close proximity to the separator as well as macro-porosity to enable gas evolution with minimal blocking of the active area. This was attempted here by applying high surface area catalytic coatings of Ni and Ni<jats:sub>1-x</jats:sub>Mo<jats:sub>x</jats:sub> on porous conducting supports with varying macro-pore structure. Furthermore, a finite element multi-physics simulation model was employed to provide further insight and guidance to the microstructural optimization effort.</jats:p><jats:p>Raising the operating temperature offers an additional means to drastically improve performance, as both ionic transport and reaction kinetics are strongly activated with temperature [2]. The development of a corrosion resistant ceramic separator [3] has enabled a novel concept of alkaline electrolysis cells operating at 200-250 °C and 20-50 bar [4,5], showing pronounced thermal activation, and achieving a current density of up to 3.75 A cm<jats:sup>-2</jats:sup> at a cell voltage of 1.75 V at 200 °C and 20 bar [6]. The feasibility and promise of this concept, as well as the challenges that lie ahead are also discussed.</jats:p><jats:p>[1] V. R. Stamenkovic, D. Strmcnik, P. P. Lopes and N. M. Markovic, <jats:italic>Nature Materials</jats:italic>, 2017, <jats:bold>16</jats:bold>, 57–69.</jats:p><jats:p>[2] M. H. Miles, G. Kissel, P. W. T. Lu and S. J. Srinivasan, <jats:italic>J. Electrochem. Soc.</jats:italic>, 1976, <jats:bold>123</jats:bold>, 332-336.</jats:p><jats:p>[3] F. Allebrod, C. Chatzichristodoulou, P. L. Mollerup and M. B. Mogensen, <jats:italic>Int. J. Hydrogen Energy</jats:italic>, 2012, <jats:bold>37</jats:bold>, 16505-16514.</jats:p><jats:p>[4] F. Allebrod, C. Chatzichristodoulou and M. B. Mogensen, <jats:italic>J. Power Sources</jats:italic>, 2013, <jats:bold>229</jats:bold>, 22–31.</jats:p><jats:p>[5] F. Allebrod, C. Chatzichristodoulou and M. B. Mogensen, <jats:italic>J. Power Sources</jats:italic>, 2014, <jats:bold>255</jats:bold>, 394-403.</jats:p><jats:p>[6] C. Chatzichristodoulou, F. Allebrod and M. B. Mogensen, <jats:italic>J. Electrochem. Soc.</jats:italic>, 2016, <jats:bold>163</jats:bold>, F3036-F3040.</jats:p>