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XPS characterisation of the interface between anode and electrolyte in a proton conducting solid oxide fuel cell
Author(s) -
Sunding M. F.,
Kepaptsoglou D. M.,
Diplas S.,
Norby T.,
Gunnæs A. E.
Publication year - 2010
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3383
Subject(s) - electrolyte , x ray photoelectron spectroscopy , solid oxide fuel cell , oxide , anode , nickel , chromia , materials science , lanthanum , inorganic chemistry , chemical engineering , analytical chemistry (journal) , chemistry , electrode , metallurgy , engineering , chromatography
In this work, we deposited by pulsed laser deposition nanometric layers of proton conducting calcium‐doped lanthanum niobate (La 0.995 Ca 0.005 NbO 4 ) on nickel substrates in order to fabricate model structures of the electrolyte‐anode interface present in potential proton conducting solid oxide fuel cells (PC‐SOFC). Characterisation by XPS of in situ reduced samples indicates the absence of chemical reaction between lanthanum niobate and nickel, confirming their reciprocal chemical stability. A peak shift to higher binding energies is observed for the elements of the electrolyte material after exposure to reducing atmosphere for several hours at a typical operating temperature for PC‐SOFC. This shift is attributed to the formation of a space charge layer in the oxide at the interface with metallic nickel. Copyright © 2010 John Wiley & Sons, Ltd.