Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 19825-19830 |
| Seitenumfang | 6 |
| Fachzeitschrift | Physical Chemistry Chemical Physics |
| Jahrgang | 15 |
| Ausgabenummer | 45 |
| Publikationsstatus | Veröffentlicht - 7 Dez. 2013 |
Abstract
We report nuclear magnetic resonance (NMR) results on water saturated, dense, nano-crystalline YSZ samples (9.5 mol% yttria doped zirconia) which exhibit proton conductivity at temperatures as low as room temperature. 1H-NMR spectra recorded under static and magic angle spinning conditions show two distinct signals. Their temperature-dependent behavior and their linewidths suggest that one can be attributed to (free) water adsorbed on the surface of the sample and the other one to mobile protons within the sample. This interpretation is supported by comparison with measurements on a single-crystalline sample. For the nano-crystalline samples motional narrowing is observed for the signal originating from protons in the sample interior. For these protons, the analysis of temperature and field dependent spin-lattice relaxation time T1 points towards diffusion in a confined two-dimensional geometry. We attribute this quasi two-dimensional motion to protons that are mobile along internal interfaces or nanopores of nano-crystalline YSZ.
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in: Physical Chemistry Chemical Physics, Jahrgang 15, Nr. 45, 07.12.2013, S. 19825-19830.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - 1H-NMR measurements of proton mobility in nano-crystalline YSZ
AU - Hinterberg, Judith
AU - Adams, Alina
AU - Blümich, Bernhard
AU - Heitjans, Paul
AU - Kim, Sangtae
AU - Munir, Zuhair A.
AU - Martin, Manfred
PY - 2013/12/7
Y1 - 2013/12/7
N2 - We report nuclear magnetic resonance (NMR) results on water saturated, dense, nano-crystalline YSZ samples (9.5 mol% yttria doped zirconia) which exhibit proton conductivity at temperatures as low as room temperature. 1H-NMR spectra recorded under static and magic angle spinning conditions show two distinct signals. Their temperature-dependent behavior and their linewidths suggest that one can be attributed to (free) water adsorbed on the surface of the sample and the other one to mobile protons within the sample. This interpretation is supported by comparison with measurements on a single-crystalline sample. For the nano-crystalline samples motional narrowing is observed for the signal originating from protons in the sample interior. For these protons, the analysis of temperature and field dependent spin-lattice relaxation time T1 points towards diffusion in a confined two-dimensional geometry. We attribute this quasi two-dimensional motion to protons that are mobile along internal interfaces or nanopores of nano-crystalline YSZ.
AB - We report nuclear magnetic resonance (NMR) results on water saturated, dense, nano-crystalline YSZ samples (9.5 mol% yttria doped zirconia) which exhibit proton conductivity at temperatures as low as room temperature. 1H-NMR spectra recorded under static and magic angle spinning conditions show two distinct signals. Their temperature-dependent behavior and their linewidths suggest that one can be attributed to (free) water adsorbed on the surface of the sample and the other one to mobile protons within the sample. This interpretation is supported by comparison with measurements on a single-crystalline sample. For the nano-crystalline samples motional narrowing is observed for the signal originating from protons in the sample interior. For these protons, the analysis of temperature and field dependent spin-lattice relaxation time T1 points towards diffusion in a confined two-dimensional geometry. We attribute this quasi two-dimensional motion to protons that are mobile along internal interfaces or nanopores of nano-crystalline YSZ.
UR - http://www.scopus.com/inward/record.url?scp=84887014014&partnerID=8YFLogxK
U2 - 10.1039/c3cp53039f
DO - 10.1039/c3cp53039f
M3 - Article
AN - SCOPUS:84887014014
VL - 15
SP - 19825
EP - 19830
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 45
ER -