Observation of Hydride Mobility in the Transition-Metal Oxide Hydride LaSrCoO3H0.7


  • We thank W. S. Howells for assistance with preliminary data collection, and C. M. Goodway, J. W. Dreyer, and A. D. Church for technical assistance with the furnace apparatus during the neutron experiments. Supporting Information is available online from Wiley InterScience or from the author.


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The diffusion of hydride anions in LaSrCoO3H0.7 is measured for the first time. High-resolution quasielastic neutron scattering (QENS) data reveals the onset of mobility above 675 K, associated with hopping between vacant sites in the hydride anion sublattice (see figure). The temperature range at which hopping takes place is similar to the temperature used for the synthesis of the material, and is associated with loss of hydrogen gas from the sample.