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000188357 1001_ $$0P:(DE-HGF)0$$aal-Wahish, A.$$b0
000188357 245__ $$aFast Proton Diffusion in Ca-doped LaPO4 studied by Quasi-Elastic Neutron Scattering
000188357 260__ $$aWashington, DC$$bSoc.$$c2014
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000188357 520__ $$aWe have investigated the diffusion dynamics of protons in hydrated 4.2%Ca-doped LaPO4, a candidate electrolyte for proton-conducting intermediate temperaturefuel cells. The macroscopic and microscopic dynamics have been studied usingelectrochemical impedance spectroscopy (EIS) and quasi-elastic neutron scattering(QENS), respectively. The conductivity of the bulk hydrated sample was determined inthe temperature range of 500−850 °C by EIS and showed a clear signature of protonconductivity with an activation energy of about 1.0 eV. The QENS experiment revealed afast dynamical process below 500 °C that was not observed by EIS. The activation energyof the fast proton diffusion is 0.09 eV in the temperature range from 150 °C to 500 °C.
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000188357 7001_ $$0P:(DE-HGF)0$$aHerwig, K. W.$$b3
000188357 7001_ $$0P:(DE-HGF)0$$aBridges, C. A.$$b4
000188357 7001_ $$0P:(DE-HGF)0$$aParanthaman, M. P.$$b5
000188357 7001_ $$0P:(DE-HGF)0$$aMandrus, D.$$b6$$eCorresponding Author
000188357 773__ $$0PERI:(DE-600)2256522-X$$a10.1021/jp5048425$$gVol. 118, no. 35, p. 20112 - 20121$$n35$$p20112-20121$$tThe @journal of physical chemistry <Washington, DC> / C$$v118$$x1932-7455$$y2014
000188357 8564_ $$uhttp://pubs.acs.org/doi/abs/10.1021/jp5048425
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