Journal Article

PUBDB-2021-03436

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single Alloy Nanoparticle X-ray Imaging during a Catalytic Reaction

Stierle, A. (Corresponding author)DESY* ; Kim, Y. Y.DESY* ; Keller, T. F.DESY* ; Goncalves, T. J. ; Abuin, M.DESY* ; Runge, H.Extern* ; Gelisio, L.DESY* ; Carnis, J.DESY* ; Vonk, V.DESY* ; Plessow, P. N. ; Vartaniants, I.DESY*

2021
Assoc. Washington, DC [u.a.]

This record in other databases:        

Please use a persistent id in citations: doi:10.1126/sciadv.abh0757  doi:10.3204/PUBDB-2021-03436

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.

---

Contributing Institute(s):

1. Nanolab (FS-NL)
2. FS-Photon Science (FS-PS)
3. FS-CFEL-1 (Group Leader: Henry Chapman) (CFEL-I)
4. European XFEL Projekt Team (Eur.XFEL)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. NFFA-Europe_supported - Technically supported by Nanoscience Foundries and Fine Analysis Europe (2020_Join2-NFFA-Europe_funded) (2020_Join2-NFFA-Europe_funded)
3. DFG project 426888090 - SFB 1441: Verfolgung der aktiven Zentren in heterogenen Katalysatoren für die Emissionskontrolle (TrackAct) (426888090) (426888090)

Experiment(s):

1. DESY NanoLab: Microscopy
2. DESY NanoLab: Surface Spectroscopy
3. DESY NanoLab: X-Ray Diffraction

Appears in the scientific report 2021

---

Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; Fees ; IF >= 10 ; JCR ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

---