1H NMR study of the hydrogen dynamics in the (NaS)xGe(OH)4 − x·yH2O ceramic proton conductors

► 1H NMR was performed on the ceramic proton conductor (NaS)xGe(OH)4 − x·yH2O. ► H3O+ at low temperature was not detected within the experimental uncertainty. ► Short- and long-range hydrogen motion occurred together.