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@ARTICLE{Gleissner:580644,
author = {Gleissner, Robert and Chung, Simon and Dalla Lana Semione,
Guilherme and Jacobse, Leon and Wagstaffe, Michael and
Tober, Steffen and Neumann, Anika Joanne and Gizer, Goekhan
and Goodwin, Christopher and Soldemo, Markus and Shipilin,
Mikhail and Loemker, Patrick and Schlueter, Christoph and
Gutowski, Olof and Muntwiler, Matthias and Amann, Peter and
Noei, Heshmat and Vonk, Vedran and Stierle, Andreas},
title = {{R}ole of {O}xidation–{R}eduction {D}ynamics in the
{A}pplication of {C}u/{Z}n{O}-{B}ased {C}atalysts},
journal = {ACS applied nano materials},
volume = {6},
number = {9},
issn = {2574-0970},
address = {Washington, DC},
publisher = {ACS Publications},
reportid = {PUBDB-2023-01346},
pages = {8004 - 8016},
year = {2023},
abstract = {We investigated Cu nanoparticles (NPs) on vicinal and basal
ZnO supports to obtain anatomistic picture of the
catalyst’s structure under in situ oxidizing and reducing
conditions.The Cu/ZnO model catalysts were investigated at
elevated gas pressures by highenergy grazing incidence X-ray
diffraction and ambient pressure X-ray
photoelectronspectroscopy (AP-XPS). We find that the Cu
nanoparticles are fully oxidized to Cu$_2$Ounder atmospheric
conditions at room temperature. As the nanoparticles swell
duringoxidation, they maintain their epitaxy on basal ZnO
(000±1) surfaces, whereas on thevicinal ZnO (10$\bar{14}$)
surface, the nanoparticles undergo a coherent tilt. We find
thatthe oxidation process is fully reversible under H$_2$
flow at 500 K, resulting in predominantlywell-aligned
nanoparticles on the basal surfaces, whereas the orientation
of CuNPs on vicinal ZnO was only partially restored. The
analysis of the substrate crystaltruncation rods evidences
the stability of basal ZnO surfaces under all gas
conditions.No Cu-Zn bulk alloy formation is observed. Under
CO$_2$ flow, no diffraction signalfrom the nanoparticles is
detected, pointing to their completely disordered state.
TheAP-XPS results are in line with the formation of CuO.
Scanning electron microscopyimages show that massive mass
transport has set in, leading to the formation of
largeragglomerates.},
cin = {FS-NL / U HH / PSI / FS-PETRA-S / Hereon},
ddc = {540},
cid = {I:(DE-H253)FS-NL-20120731 / $I:(DE-H253)U_HH-20120814$ /
I:(DE-H253)PSI-20200229 / I:(DE-H253)FS-PETRA-S-20210408 /
I:(DE-H253)Hereon-20210428},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3) /
DFG project 390715994 - EXC 2056: CUI: Advanced Imaging of
Matter (390715994) / DFG project 194651731 - EXC 1074:
Hamburger Zentrum für ultraschnelle Beobachtung (CUI):
Struktur, Dynamik und Kontrolle von Materie auf atomarer
Skala (194651731) / HIRS-0018 - Helmholtz-Lund International
School - Intelligent instrumentation for exploring matter at
different time and length scales (HELIOS) $(2020_HIRS-0018)$
/ SWEDEN-DESY - SWEDEN-DESY Collaboration
$(2020_Join2-SWEDEN-DESY)$},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3 /
G:(GEPRIS)390715994 / G:(GEPRIS)194651731 /
$G:(DE-HGF)2020_HIRS-0018$ /
$G:(DE-HGF)2020_Join2-SWEDEN-DESY$},
experiment = {EXP:(DE-H253)P-P07-20150101 / EXP:(DE-H253)P-P22-20150101 /
EXP:(DE-H253)Nanolab-01-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000985512600001},
doi = {10.1021/acsanm.3c01306},
url = {https://bib-pubdb1.desy.de/record/580644},
}