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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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Nielsen, Ulla Gro
University of Southern Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (25/25 displayed)
- 2023The effects of low oxidation-reduction potential on the performance of full-scale hybrid membrane-aerated biofilm reactorscitations
- 2021Synthesis and Thermal Degradation of MAl4(OH)12SO4·3H2O with M = Co2+, Ni2+, Cu2+, and Zn2+citations
- 2021Synthesis and Thermal Degradation of MAl 4 (OH) 12 SO 4 ·3H 2 O with M = Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+citations
- 2020The Effect of oxygen defects on the structural evolution of LiVPO4F1−yoy cathode materialscitations
- 2020Remarkable reversal of 13 C-NMR assignment in d 1 , d 2 compared to d 8 , d 9 acetylacetonate complexes:Analysis and explanation based on solid-state MAS NMR and computationscitations
- 2020Remarkable reversal of 13C-NMR assignment in d1, d2 compared to d8, d9 acetylacetonate complexescitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, γ-Mg(BH4)2-MHx, M = Li, Na, Mg, Cacitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, $mathrm{γ-Mg(BH_{4})_{2}-MH_{x}, M = Li, Na, Mg, Ca}$citations
- 2019Montmorillonite-surfactant hybrid particles for modulating intestinal P-glycoprotein-mediated transportcitations
- 2019Reactivity of magnesium borohydride – Metal hydride composites, γ-Mg(BH 4 ) 2 -MH x , M = Li, Na, Mg, Cacitations
- 2019Synthesis and Structural Characterization of a Pure ZnAl 4 (OH) 12 (SO 4 )·2.6H 2 O Layered Double Hydroxidecitations
- 2019Synthesis and Structural Characterization of a Pure ZnAl 4 (OH) 12 (SO 4 )·2.6H 2 O Layered Double Hydroxidecitations
- 2018Order in disorder:solution and solid-state studies of [MM] wheels (M = Cr, Al; M = Ni, Zn)citations
- 2018Order in disordercitations
- 2018In situ processing of fluorinated carbon—Lithium fluoride nanocompositescitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2016The role of aluminium as an additive element in the synthesis of porous 4H-silicon carbidecitations
- 2015How the Method of Synthesis Governs the Local and Global Structure of Zinc Aluminum Layered Double Hydroxidescitations
- 2015How the Method of Synthesis Governs the Local and Global Structure of Zinc Aluminum Layered Double Hydroxidescitations
- 2015The effect of preparation method on the proton conductivity of indium doped tin pyrophosphatescitations
- 2014The stoichiometry of synthetic alunite as a function of hydrothermal ageing investigated by solid-state NMR spectroscopy, powder X-ray diffraction, and infrared spectroscopycitations
- 2012Preparation of Nafion 117™-SnO 2 Composite Membranes using an Ion-Exchange Methodcitations
- 2012Preparation of Nafion 117™-SnO2 Composite Membranes using an Ion-Exchange Methodcitations
- 2010Preparation of Nafion 117™-SnO2 Composite Membranes using an Ion-Exchange Method
- 2010Fremstilling af Nafion 117™-SnO 2 kompositmembraner ved brug af en ionbytningsmetode ; Preparation of Nafion 117™-SnO 2 Composite Membranes using an Ion-Exchange Method
Places of action
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article
The effect of preparation method on the proton conductivity of indium doped tin pyrophosphates
Abstract
<p>Indium doped tin pyrophosphates were prepared by three synthetic routes. A heterogeneous synthesis from metal oxides with excess phosphoric acid produces crystalline phosphate particles with a phosphorus rich amorphous phase along the grain boundaries. The amorphous phase prevents the agglomeration of particles, hydrolyzes in moist atmosphere as revealed by FT-IR and solid state NMR, and facilitates a high proton conductivity (above 2.5 × 10<sup>-2</sup> Scm<sup>- 1</sup>) with high stability at above 120 °C under a water partial pressure of 0.15 atm. This phase can be removed by washing with water, resulting in a dramatic decrease in conductivity as well as significant agglomeration of the particles, as evident in TEM and from particle size distribution measurements. Homogeneous synthesis with soluble metal acetates or chlorides as precursors results in a single crystalline phase with a small particle size, but strongly agglomerated, and a low conductivity at 10<sup>- 7</sup>-10<sup>- 6</sup> Scm<sup>- 1</sup> level. Further impregnation of the agglomerates with phosphoric acid does not lead to formation of the phosphorus rich amorphous layers on the surface of the crystals. An intermediate conductivity of 10<sup>- 3</sup> Scm<sup>- 1</sup> was observed for the acid treated phosphates from the chloride synthesis but no improvement for the acid treated phosphates from the acetate synthesis was observed.</p>