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Coherent X-ray Imaging of CO-Adsorption-Induced Structural Changes in Pt Nanoparticles: Implications for Catalysis

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dc.contributor.authorAbuin, Manuel
dc.contributor.authorKim, Young Yong
dc.contributor.authorRunge, Henning
dc.contributor.authorKulkarni, Satishkumar
dc.contributor.authorVartanyants, Ivan A.
dc.date.accessioned2024-11-21T11:39:14Z
dc.date.available2024-11-21T11:39:14Z
dc.date.issued2019
dc.description.abstractUsing coherent X-ray diffraction imaging (CXDI) as an in situ tool, we determined the shape and strain state of a platinum nanoparticle with approximate to 160 nm diameter supported by a strontium titanate substrate. The experiment was performed at a temperature of 400 K under continuous gas flow conditions of pure Ar and Ar/CO mixtures. The nanoparticle was preselected by scanning electron microscopy (SEM) and postanalyzed by atomic force microscopy (AFM). We obtain a very good agreement between the overall nanoparticle size, shape, and defect structure as determined by CXDI and AFM. In addition, we compare the strain state in the nanoparticle near surface region and its bulk: For pure Ar flow, we find a slight compressive strain in the nanoparticle bulk compared to an expansion in the near surface region. We ascribe the latter to the presence of high index vicinal surfaces. Our analysis suggests that under mixed Ar/CO flow at 400 K reshaping of the nanoparticle occurred. New high index facets developed, leading to a stronger lattice expansion, also propagating into the nanoparticle bulk. Our high-resolution experiments pave the way for future CXDI experiments under operando catalytic reaction conditions.
dc.format.extentС. 4818-4824;
dc.identifier.citationCoherent X-ray Imaging of CO-Adsorption-Induced Structural Changes in Pt Nanoparticles: Implications for Catalysis / Abuin, Manuel [et al.] // ACS Applied Nano Materials. - 2019. - 2. - № 8. - P. 4818-4824;. - 10.1021/acsanm.9b00764
dc.identifier.doi10.1021/acsanm.9b00764
dc.identifier.urihttps://www.doi.org/10.1021/acsanm.9b00764
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85076515093&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000483440400016
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/18647
dc.relation.ispartofACS Applied Nano Materials
dc.titleCoherent X-ray Imaging of CO-Adsorption-Induced Structural Changes in Pt Nanoparticles: Implications for Catalysis
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.volume2
relation.isOrgUnitOfPublicationdcdb137c-0528-46a5-841b-780227a67cce
relation.isOrgUnitOfPublication.latestForDiscoverydcdb137c-0528-46a5-841b-780227a67cce
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