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@ARTICLE{Jacobse:474354,
author = {Jacobse, Leon and Vonk, Vedran and Mccrum, Ian and Seitz,
Christoph and Koper, Marc and Rost, Marcel and Stierle,
Andreas},
title = {{E}lectrochemical oxidation of {P}t(111) beyond the
place-exchange model},
journal = {Electrochimica acta},
volume = {407},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PUBDB-2022-00712},
pages = {139881},
year = {2022},
abstract = {Oxide formation plays an important role in the degradation
of Pt electrocatalysts. However, the exact oxide structure
and reaction mechanism are not fully understood. Here, we
used in situ surface X-ray diffraction experiments to
resolve the oxide formation at a Pt(111) model electrode at
potentials near the onset of the oxygen evolution reaction.
Fast experiments are possible by using X-ray photons with a
high kinetic energy in combination with a large 2D detector.
By employing very low potential sweep rates we obtain a more
ordered oxidized surface compared to literature data from
potential step experiments. This demonstrates that the
oxidation process is strongly governed by the reaction
kinetics. The increased surface order enables us to
disentangle two subsequent oxidation process; initially the
place-exchange process, followed by the formation of a
partially disordered oxide in which still $50\%$ of the
surface atoms reside on sites commensurate to the Pt(111)
surface. The reduction experiments indicate that the
place-exchange process is structurally reversible, whereas
the disordered oxide causes the surface roughening observed
during potential cycling. Despite the increased surface
order, oxide superstructures are not observed. These results
provide important insights in the oxidation and degradation
process of Pt(111), which are valuable for the design of
improved electrocatalysts and they rationalize operating
procedures.},
cin = {DOOR ; HAS-User / FS-NL},
ddc = {540},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-NL-20120731},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
NFFA-Europe - NANOSCIENCE FOUNDRIES AND FINE ANALYSIS -
EUROPE (654360) / $NFFA-Europe_supported$ - Technically
supported by Nanoscience Foundries and Fine Analysis Europe
$(2020_Join2-NFFA-Europe_funded)$},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
G:(EU-Grant)654360 /
$G:(DE-HGF)2020_Join2-NFFA-Europe_funded$},
experiment = {EXP:(DE-H253)Nanolab-05-20200101 /
EXP:(DE-H253)Nanolab-03-20150101 /
EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000794205200013},
doi = {10.1016/j.electacta.2022.139881},
url = {https://bib-pubdb1.desy.de/record/474354},
}