Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale Huang, Wenyu Ma, Tao Wang, Shuai Chen, Minda Johnson, Duane Maligal-Ganesh, Raghu Wang, Lin-Lin Johnson, Duane Kramer, Matthew Huang, Wenyu Zhou, Lin
dc.contributor.department Ames Laboratory
dc.contributor.department Materials Science and Engineering
dc.contributor.department Chemistry 2019-08-19T06:36:51.000 2020-06-29T23:22:09Z 2020-06-29T23:22:09Z 2020-03-28 2019-03-28
dc.description.abstract <p>Intermetallic nanoparticles (iNPs) have yielded enormous successes in catalytic applications by the formation of ordered phases. However, atomic level understanding of the alloying mechanism, which plays a pivotal role for controlling intermetallic phases and tailoring their catalytic properties, is still elusive. In this study, we discovered a consecutive formation of ordered Pt3Sn and PtSn phases during the growth of Pt–Sn iNP inside a well-defined nano-reactor at elevated temperature using in-situ scanning transmission electron microscopy. We found that the surface-mediated diffusion of Sn controls overall dynamics of the reaction, while the unique coherent interfacial structure is determinative for the PtSn transformation. We then further controlled the phase selection of Pt–Sn iNPs and demonstrated their distinguishable catalytic behaviors. Our findings not only provide detailed experimental evidence on the alloying mechanism in intermetallic nanoscale systems, but also pave the way for mechanistic control of synthesis and catalytic properties of iNPs.</p>
dc.identifier archive/
dc.identifier.articleid 1306
dc.identifier.contextkey 14796419
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ameslab_manuscripts/308
dc.language.iso en
dc.relation.ispartofseries IS-J 9881
dc.source.bitstream archive/|||Fri Jan 14 23:29:32 UTC 2022
dc.source.uri 10.1016/j.chempr.2019.02.026
dc.subject.disciplines Catalysis and Reaction Engineering
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.keywords intermetallic nanoparticles
dc.subject.keywords in situ transmission electron microscopy
dc.subject.keywords phase transformation
dc.subject.keywords catalysis
dc.subject.keywords acetylene hydrogenation
dc.subject.keywords PtSn
dc.subject.keywords Pt3Sn
dc.title Toward Phase and Catalysis Control: Tracking the Formation of Intermetallic Nanoparticles at Atomic Scale
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 6acd59cc-28ec-46dd-8bf0-51bcc56d79f9
relation.isAuthorOfPublication ed24845f-863f-4613-9f76-130602a21b4a
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relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
relation.isOrgUnitOfPublication 42864f6e-7a3d-4be3-8b5a-0ae3c3830a11
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