| People | Locations | Statistics |
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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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Savaniu, Cristian Daniel
University of St Andrews
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023The exsolution of Cu particles from doped barium cerate zirconate via barium cuprate intermediate phasescitations
- 2021Aqueous thick-film ceramic processing of planar solid oxide fuel cells using La0.20Sr0.25Ca0.45TiO3 anode supports
- 2021Use of interplay between A-site non-stoichiometry and hydroxide doping to deliver novel proton-conducting perovskite oxidescitations
- 2021Aqueous thick-film ceramic processing of planar solid oxide fuel cells using La 0.20 Sr 0.25 C a0.45 TiO 3 anode supports
- 2020High oxide ion and proton conductivity in a disordered hexagonal perovskitecitations
- 2015Anodescitations
- 2015Utilisation of coal in direct carbon fuel cellscitations
- 2013Preparation via a solution method of La 0.2 Sr 0.25 Ca 0.45 TiO 3 and its characterization for anode supported solid oxide fuel cellscitations
- 2013Preparation via a solution method of La0.2Sr0.25Ca0.45TiO3 and its characterization for anode supported solid oxide fuel cellscitations
- 2011La-doped SrTiO3 as anode material for IT-SOFCcitations
- 2010Disruption of extended defects in solid oxide fuel cell anodes for methane oxidation
- 2009Reduction studies and evaluation of surface modified A-site deficient La-doped SrTiO3 as anode material for IT-SOFCscitations
- 2009Intermediate temperature SOFC anode component based on A-site deficient La-doped SrTiO3citations
- 2006Disruption of extended defects in solid oxide fuel cell anodes for methane oxidationcitations
- 2006Disruption of extended defects in solid oxide fuel cell anodes for methane oxidationcitations
Places of action
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article
Use of interplay between A-site non-stoichiometry and hydroxide doping to deliver novel proton-conducting perovskite oxides
Abstract
The magnitude of ionic conductivity is known to depend upon both mobility and number of available carriers. For proton conductors, hydration is a key factor in determining the charge–carrier concentration in ABO<sub>3</sub> perovskite oxides. Despite the high reported proton mobility of calcium titanate (CaTiO<sub>3</sub>), this titanate perovskite has thus far been regarded as a poor proton conductor due to the low hydration capability. Here, the enhanced proton conductivity of the defective calcium titanate Ca<sub>0.92</sub>TiO<sub>2.84</sub>(OH)<sub>0.16</sub> prepared by replacing lattice oxygens with hydroxyl groups via a solvothermal route is shown. Conductivity measurements in a humidified Ar atmosphere reveal that, remarkably, this material exhibits one order of magnitude higher bulk conductivity (10<sup>−4</sup> Scm<sup>−1</sup> at 200 °C) than hydrated stoichiometric CaTiO<sub>3</sub> prepared by traditional solid-state synthesis due to the higher concentration of protonic defects and variation in the crystal structure. The replacement of Ca<sup>2+</sup> by Ni<sup>2+</sup> in the Ca<sub>1−x</sub>Ti1O<sub>3−2x</sub>(OH)<sub>2x</sub>, which mostly exsolve metallic Ni nanoparticles along orthorhombic (100) planes upon reduction, is also demonstrated. These results suggest a new strategy by tailoring the defect chemistry via hydration or cation doping followed by exsolution for targeted energy applications.