1H NMR study of the hydrogen dynamics in the (NaS)xGe(OH)4-x*y H2O ceramic proton conductors
Journal article, 2012

1H NMR was performed on the ceramic proton conductor (NaS)xGe(OH)4-x*y H2O for x=2,3 and y≈1-4 over the temperature range of −100 °C to 400 °C. NMR spectra, nuclear spin-lattice relaxation rates (R1), spin-spin relaxation rates (R2), and rotating frame relaxation rates (R1ρ) were obtained for both hydrated and dehydrated samples. It was found that the low temperature NMR spectra were consistent with simulated H2O lineshapes, and the presence of H3O+ at low temperature was not detected within the experimental uncertainty. Short- and long-range hydrogen motion occurred together, a signature of Grotthuss conduction mechanisms. The long range motion was a combination of H+ and H2O diffusion, with H2O motion limiting H+ dynamics as the onset temperature was approached.

Grotthuss

Water

Dynamics

Conductor

NMR

Proton

Author

Ananda Shastri

Minnesota State University Moorhead

David Shane

Washington University in St. Louis

Jonas Nordström

Chalmers, Applied Physics, Condensed Matter Physics

Aleksandar Matic

Chalmers, Applied Physics, Condensed Matter Physics

Steve Martin

Iowa State University

Solid State Ionics

0167-2738 (ISSN)

Vol. 228 46-55

Driving Forces

Sustainable development

Subject Categories

Materials Chemistry

Condensed Matter Physics

Areas of Advance

Materials Science

DOI

10.1016/j.ssi.2012.09.017

More information

Created

10/7/2017