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@ARTICLE{Stierle:462477,
author = {Stierle, Andreas and Kim, Young Yong and Keller, Thomas F.
and Goncalves, Tiago J. and Abuin, Manuel and Runge, Henning
and Gelisio, Luca and Carnis, Jerome and Vonk, Vedran and
Plessow, Philipp N. and Vartaniants, Ivan},
title = {{S}ingle {A}lloy {N}anoparticle {X}-ray {I}maging during a
{C}atalytic {R}eaction},
journal = {Science advances},
volume = {7},
number = {40},
issn = {2375-2548},
address = {Washington, DC [u.a.]},
publisher = {Assoc.},
reportid = {PUBDB-2021-03436},
pages = {eabh0757},
year = {2021},
abstract = {The imaging of active nanoparticles represents a milestone
in decoding heterogeneous catalysts’ dynamics. We report
the facet resolved, surface strain state of a single PtRh
alloy nanoparticle on SrTiO3 determined by coherent x-ray
diffraction imaging under catalytic reaction conditions.
Density functional theory calculations allow us to correlate
the facet surface strain state to its reaction environment
dependent chemical composition. We find that the initially
Pt 20 terminated nanoparticle surface gets Rh enriched under
CO oxidation reaction conditions. The local composition is
facet orientation dependent and the Rh enrichment is
non-reversible under subsequent CO reduction. Tracking facet
resolved strain and composition under operando conditions is
crucial for a rational design of more efficient
heterogeneous catalysts with tailored activity, selectivity
and lifetime.},
cin = {FS-NL / FS-PS / CFEL-I / Eur.XFEL},
ddc = {500},
cid = {I:(DE-H253)FS-NL-20120731 / I:(DE-H253)FS-PS-20131107 /
I:(DE-H253)CFEL-I-20161114 / $I:(DE-H253)Eur_XFEL-20120731$},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / $NFFA-Europe_supported$ - Technically
supported by Nanoscience Foundries and Fine Analysis Europe
$(2020_Join2-NFFA-Europe_funded)$ / DFG project 426888090 -
SFB 1441: Verfolgung der aktiven Zentren in heterogenen
Katalysatoren für die Emissionskontrolle (TrackAct)
(426888090)},
pid = {G:(DE-HGF)POF4-632 /
$G:(DE-HGF)2020_Join2-NFFA-Europe_funded$ /
G:(GEPRIS)426888090},
experiment = {EXP:(DE-H253)Nanolab-04-20150101 /
EXP:(DE-H253)Nanolab-02-20150101 /
EXP:(DE-H253)Nanolab-03-20150101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:34597137},
UT = {WOS:000703091100013},
doi = {10.1126/sciadv.abh0757},
url = {https://bib-pubdb1.desy.de/record/462477},
}