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001     18278
005     20180208224809.0
024 7 _ |a pmid:21221435
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024 7 _ |a 10.1039/C0CP01024C
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024 7 _ |a WOS:000287041700046
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024 7 _ |a 1463-9076
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024 7 _ |a 2128/7365
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037 _ _ |a PreJuSER-18278
041 _ _ |a eng
082 _ _ |a 540
084 _ _ |2 WoS
|a Chemistry, Physical
084 _ _ |2 WoS
|a Physics, Atomic, Molecular & Chemical
100 1 _ |a Valov, I.
|b 0
|u FZJ
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245 _ _ |a Electrochemical activation of molecular nitrogen at the Ir/YSZ interface
260 _ _ |c 2011
|a Cambridge
|b RSC Publ.
300 _ _ |a 3394 - 3410
336 7 _ |a Journal Article
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440 _ 0 |a Physical Chemistry Chemical Physics
|x 1463-9076
|0 4916
|y 8
|v 13
500 _ _ |3 POF3_Assignment on 2016-02-29
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a Nitrogen is often used as an inert background atmosphere in solid state studies of electrode and reaction kinetics, of solid state studies of transport phenomena, and in applications e.g. solid oxide fuel cells (SOFC), sensors and membranes. Thus, chemical and electrochemical reactions of oxides related to or with dinitrogen are not supposed and in general not considered. We demonstrate by a steady state electrochemical polarisation experiments complemented with in situ photoelectron spectroscopy (XPS) that at a temperature of 450 °C dinitrogen can be electrochemically activated at the three phase boundary between N(2), a metal microelectrode and one of the most widely used solid oxide electrolytes--yttria stabilized zirconia (YSZ)--at potentials more negative than E = -1.25 V. The process is neither related to a reduction of the electrolyte nor to an adsorption process or a purely chemical reaction but is electrochemical in nature. Only at potentials more negative than E = -2 V did new components of Zr 3d and Y 3d signals with a lower formal charge appear, thus indicating electrochemical reduction of the electrolyte matrix. Theoretical model calculations suggest the presence of anionic intermediates with delocalized electrons at the electrode/electrolyte reaction interface. The ex situ SIMS analysis confirmed that nitrogen is incorporated and migrates into the electrolyte beneath the electrode.
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700 1 _ |a Luerssen, B.
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700 1 _ |a Mutoro, E.
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700 1 _ |a Gregoratti, L.
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700 1 _ |a deSouza, R.A.
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700 1 _ |a Bredow, T.
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700 1 _ |a Günther, S.
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700 1 _ |a Barinov, A.
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700 1 _ |a Dudin, P.
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700 1 _ |a Martin, M.
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700 1 _ |a Janek, J.
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773 _ _ |0 PERI:(DE-600)1476244-4
|a 10.1039/c0cp01024c
|g Vol. 13, p. 3394 - 3410
|p 3394 - 3410
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|t Physical Chemistry Chemical Physics
|v 13
|x 1463-9076
|y 2011
856 7 _ |u http://dx.doi.org/10.1039/C0CP01024C
856 4 _ |u https://juser.fz-juelich.de/record/18278/files/FZJ-18278.pdf
|y Published under German "Allianz" Licensing conditions on 2011-01-11. Available in OpenAccess from 2012-01-11
|z Published final document.
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