1H-NMR measurements of proton mobility in nano-crystalline YSZ | Zendy

Judith Hinterberg | Zendy; Alina Adams | Zendy; Bernhard Blümich | Zendy; Paul Heitjans | Zendy; Sangtae Kim | Zendy; Zuhair A. Munir | Zendy; Manfred Martin | Zendy

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1H-NMR measurements of proton mobility in nano-crystalline YSZ

Author(s) -

Judith Hinterberg,

Alina Adams,

Bernhard Blümich,

Paul Heitjans,

Sangtae Kim,

Zuhair A. Munir,

Manfred Martin

Publication year - 2013

Publication title -

physical chemistry chemical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.053

H-Index - 239

eISSN - 1463-9084

pISSN - 1463-9076

DOI - 10.1039/c3cp53039f

Subject(s) - yttria stabilized zirconia , proton , magic angle , materials science , relaxation (psychology) , nano , spin–lattice relaxation , conductivity , cubic zirconia , analytical chemistry (journal) , nuclear magnetic resonance , chemical physics , chemistry , nuclear magnetic resonance spectroscopy , psychology , ceramic , social psychology , physics , quantum mechanics , chromatography , composite material

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. (1)H-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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