Abstract
Proton conduction is reported in partially proton-exchanged WP 2 O 7 at intermediate temperatures. Electrochemical measurements demonstrated that proton conduction occurs in this material. Proton magic angle spinning nuclear magnetic resonance and Fourier transform IR analyses revealed that the ion-exchanged protons interact with the lattice oxide ions in WP 2 O 7 to form hydrogen bonds. The H/D isotope effect suggests that proton conduction in this material is based on the hopping mechanism. Consequently, the electrical conductivity of this material reached 1.1 x 10 -3 S cm -1 at 250°C and 1.7 × 10 -2 S cm -1 at 500°C.
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