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@ARTICLE{Lenser:844946,
author = {Lenser, Christian and Lu, Qiyang and Crumlin, Ethan and
Bluhm, Hendrik and Yildiz, Bilge},
title = {{C}harge {T}ransfer {A}cross {O}xide {I}nterfaces {P}robed
by in {S}itu {X}-ray {P}hotoelectron and {A}bsorption
{S}pectroscopy {T}echniques},
journal = {The journal of physical chemistry / C},
volume = {122},
number = {9},
issn = {1932-7447},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2018-02285},
pages = {4841 - 4848},
year = {2018},
abstract = {The interface between two functional oxide materials
governs the physical, chemical, and electronic interactions
between the two phases. We investigate the charge transfer
across the interface between two structurally related
material classes, namely, perovskite and
Ruddlesden–Popper-type oxides, choosing
La0.8Sr0.2CoO3−δ (LSC) and Nd2NiO4+δ (NNO) as our model
systems for the two classes, respectively. The interface of
Nd2NiO4+δ and La0.8Sr0.2CoO3−δ is investigated using in
situ photoemission spectroscopy techniques on epitaxial thin
films. A detailed analysis of the electronic structure with
X-ray photoelectron spectroscopy and X-ray absorption
spectroscopy under an oxygen atmosphere and at elevated
temperature reveals charge transfer from La0.8Sr0.2CoO3−δ
into Nd2NiO4+δ. Through the use of electrical conductivity
relaxation, it is demonstrated that such charge transfer
from LSC into NNO is accompanied by a reduction in the
kinetics of oxygen exchange on Nd2NiO4+δ, contrary to
expectation. Fermi level pinning at the surface of
Nd2NiO4+δ is discussed as a possible cause for this
phenomenon. These insights add to the understanding of
material interaction necessary for the design of
next-generation high-performance electrochemical
components.},
cin = {IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000427331300012},
doi = {10.1021/acs.jpcc.7b10284},
url = {https://juser.fz-juelich.de/record/844946},
}