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@ARTICLE{Thalinger:200838,
author = {Thalinger, Ramona and Opitz, Alexander K. and Kogler,
Sandra and Heggen, Marc and Stroppa, Daniel and Schmidmair,
Daniela and Tappert, Ralf and Fleig, Jürgen and Klötzer,
Bernhard and Penner, Simon},
title = {{W}ater-{G}as {S}hift and {M}ethane {R}eactivity on
{R}educible {P}erovskite-{T}ype {O}xides},
journal = {The journal of physical chemistry / C},
volume = {119},
number = {21},
issn = {1932-7455},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2015-03218},
pages = {11739 - 11753},
year = {2015},
abstract = {Comparative (electro)catalytic, structural, and
spectroscopic studies in hydrogen electro-oxidation, the
(inverse) water-gas shift reaction, and methane conversion
on two representative mixed ionic–electronic conducting
perovskite-type materials La0.6Sr0.4FeO3−δ (LSF) and
SrTi0.7Fe0.3O3−δ (STF) were performed with the aim of
eventually correlating (electro)catalytic activity and
associated structural changes and to highlight intrinsic
reactivity characteristics as a function of the reduction
state. Starting from a strongly prereduced (vacancy-rich)
initial state, only (inverse) water-gas shift activity has
been observed on both materials beyond ca. 450 °C but no
catalytic methane reforming or methane decomposition
reactivity up to 600 °C. In contrast, when starting from
the fully oxidized state, total methane oxidation to CO2 was
observed on both materials. The catalytic performance of
both perovskite-type oxides is thus strongly dependent on
the degree/depth of reduction, on the associated reactivity
of the remaining lattice oxygen, and on the
reduction-induced oxygen vacancies. The latter are clearly
more reactive toward water on LSF, and this higher
reactivity is linked to the superior electrocatalytic
performance of LSF in hydrogen oxidation. Combined electron
microscopy, X-ray diffraction, and Raman measurements in
turn also revealed altered surface and bulk structures and
reactivities.},
cin = {PGI-5},
ddc = {540},
cid = {I:(DE-Juel1)PGI-5-20110106},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000355495600053},
pubmed = {pmid:26045733},
doi = {10.1021/acs.jpcc.5b02947},
url = {https://juser.fz-juelich.de/record/200838},
}