Direct view on nanoionic proton mobility

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dc.contributor.authorChan, WKen_AU
dc.contributor.authorHaverkate, LAen_AU
dc.contributor.authorBorghols, WJHen_AU
dc.contributor.authorWagemaker, Men_AU
dc.contributor.authorPicken, SJen_AU
dc.contributor.authorvan Eck, ERHen_AU
dc.contributor.authorKentgens, APMen_AU
dc.contributor.authorJohnson, MRen_AU
dc.contributor.authorKearley, GJen_AU
dc.contributor.authorMulder, FMen_AU
dc.date.accessioned2011-11-22T02:35:43Zen_AU
dc.date.available2011-11-22T02:35:43Zen_AU
dc.date.issued2011-04-22en_AU
dc.date.statistics2011-11-18en_AU
dc.description.abstractThe field of nanoionics is of great importance for the development of superior materials for devices that rely on the transport of charged ions, like fuel cells, batteries, and sensors. Often nanostructuring leads to enhanced ionic mobilities due to the induced space-charge effects. Here these large space-charge effects occurring in composites of the proton-donating solid acid CsHSO4 and the proton-accepting TiO2 or SiO2 are studied. CsHSO4 is chosen for this study because it can operate effectively as a fuel-cell electrolyte at elevated temperature while its low-temperature conductivity is increased upon nanostructuring. The composites have a negative enthalpy of formation for defects involving the transfer of protons from the acid to the acceptor. Very high defect densities of up to 10% of the available sites are observed by neutron diffraction. The effect on the mobility of the protons is observed directly using quasielastic neutron scattering and nuclear magnetic resonance spectroscopy. Surprisingly large fractions of up to 25% of the hydrogen ions show orders-of-magnitude enhanced mobility in the nanostructured composites of TiO2 or SiO2, both in crystalline CsHSO4 and an amorphous fraction.© 2011, Wiley-Blackwell. The definitive version is available at www3.interscience.wiley.comen_AU
dc.identifier.citationChan, W. K., Haverkate, L. A., Borghols, W. J. H., Wagemaker, M., Picken, S. J., van Eck, E. R. H., Kentgens, A. P. M., Johnson, M. R., Kearley, G. J., & Mulder, F. M. (2011). Direct View on Nanoionic Proton Mobility, Advanced Functional Materials, 21(8), 1364-1374. doi:10.1002/adfm.201001933en_AU
dc.identifier.govdoc3789en_AU
dc.identifier.issn1616-301Xen_AU
dc.identifier.issue8en_AU
dc.identifier.journaltitleAdvanced functional materialsen_AU
dc.identifier.pagination1364-1374en_AU
dc.identifier.urihttp://dx.doi.org/10.1002/adfm.201001933en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3876en_AU
dc.identifier.volume21en_AU
dc.language.isoenen_AU
dc.publisherWiley-Blackwellen_AU
dc.subjectProtonsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectDiffusionen_AU
dc.subjectFuel cellsen_AU
dc.subjectHydrogenen_AU
dc.subjectNanostructuresen_AU
dc.titleDirect view on nanoionic proton mobilityen_AU
dc.typeJournal Articleen_AU
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