H/D isotope effects in high temperature proton conductors

Nikolaos Bonanos, A. Huijser, Finn Willy Poulsen

Research output: Contribution to journalJournal articleResearchpeer-review

391 Downloads (Pure)

Abstract

The atomic mass ratio of ca. 2 between deuterium and hydrogen is the highest for any pair of stable isotopes and results in significant and measurable H/D isotope effects in high temperature proton conductors containing these species. This paper discusses H/D isotope effects manifested in O-H/O-D vibration frequencies, the mobility of H+/D+ carriers, the kinetics of the electrochemical oxidation of H2/D2, the solubilities of H2O/D2O and, finally, the spontaneous electromotive force that appears across H2/D2 cells with proton conducting electrolytes. Comparable work on tritium-exchanged materials is also discussed. The results highlight the usefulness of isotope effects in the study of high temperature proton conductors.
Original languageEnglish
JournalSolid State Ionics
Volume275
Pages (from-to)9-13
Number of pages5
ISSN0167-2738
DOIs
Publication statusPublished - 2015

Keywords

  • Proton conductor Isotope effect Hydrogen Deuterium Tritium Zero point energy
  • Carrier mobility
  • Deuterium
  • Electrochemical oxidation
  • Hydrogen
  • Protons
  • Tritium
  • Atomic mass
  • High temperature proton conductor
  • Isotope effect
  • Proton conductors
  • Proton-conducting electrolyte
  • Stable isotopes
  • Vibration frequency
  • Zero-point energies
  • Isotopes

Cite this