Absence of Ni on the outer surface of Sr doped La 2 NiO 4 single crystals
Hill, John P.
Muñoz-Márquez, Miguel A.
Brongersma, Hidde H.
Kilner, John A.
Ryan, Mary P.
Skinner, Stephen J.
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AbstractA combination of surface sensitive techniques was used to determine the surface structure and chemistry of La2-xSrxNiO 4+δ. These measurements unequivocally showed that Ni is not present in the outermost atomic layer, suggesting that the accepted model with the B-site cations exposed to the environment is incorrect. © 2014 The Royal Society of Chemistry.
CitationBurriel M, Wilkins S, Hill JP, Muñoz-Márquez MA, Brongersma HH, et al. (2014) Absence of Ni on the outer surface of Sr doped La 2 NiO 4 single crystals . Energy Environ Sci 7: 311–316. Available: http://dx.doi.org/10.1039/c3ee41622d.
SponsorsThis research was supported by a Marie Curie Intra European Fellowship within the seventh European Community Framework Programme (PIEF-GA-2009-252711) and by KAUST (King Abdullah University of Science and Technology) Academic Excellence Alliance (for M.B). Use of the National Synchrotron Light Source, and work carried out at Brookhaven National Laboratory, was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract no. DE-AC02-98CH10886. The authors also thank D. Prabhakaran (University of Oxford) for providing single crystals and M. Fartmann (TASCON GmbH), T. Grehl, P. Bruner (ION-TOF GmbH), S. Fearn and H. Tellez (Imperial College) for LEIS measurements and support with LEIS data analysis.
PublisherRoyal Society of Chemistry (RSC)
JournalEnergy Environ. Sci.