Structure Determination of a Surface Tetragonal Pt1Sb1 Phase on Pt Nanoparticles

Chenliang Ye; Zhenwei Wu; Wei Liu; Yang Ren; Guanghui Zhang; Jeffrey T. Miller

doi:10.1021/acs.chemmater.8b02071

Structure Determination of a Surface Tetragonal Pt₁Sb₁ Phase on Pt Nanoparticles

Chenliang Ye
, Zhenwei Wu
, Wei Liu
, Yang Ren
, Guanghui Zhang^*
, Jeffrey T. Miller

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

29 Citations (Scopus)

Abstract

A new tetragonal Pt₁Sb₁ phase not known in phase diagram was evidenced in 2-3 nm core-shell nanoparticle catalysts by in situ synchrotron XAS, XRD, HAADF imaging, and EDS analysis. A kinetically controlled diffusion of Sb(0) into Pt(0) nanoparticles with minimum atomic rearrangement of the FCC Pt structure was proposed to explain the formation of this unique phase on top of a Pt core at the nanoscale. Each Pt atom is isolated by Sb atoms, and thus the Pt₁Sb₁ alloy exhibits high selectivity in propane dehydrogenation reaction resulting from the geometric effect that minimizes the hydrogenolysis side reaction.

Original language	English
Pages (from-to)	4503-4507
Journal	Chemistry of Materials
Volume	30
Issue number	14
DOIs	https://doi.org/10.1021/acs.chemmater.8b02071
Publication status	Published - 24 Jul 2018
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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Cite this

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title = "Structure Determination of a Surface Tetragonal Pt1Sb1 Phase on Pt Nanoparticles",

abstract = "A new tetragonal Pt1Sb1 phase not known in phase diagram was evidenced in 2-3 nm core-shell nanoparticle catalysts by in situ synchrotron XAS, XRD, HAADF imaging, and EDS analysis. A kinetically controlled diffusion of Sb(0) into Pt(0) nanoparticles with minimum atomic rearrangement of the FCC Pt structure was proposed to explain the formation of this unique phase on top of a Pt core at the nanoscale. Each Pt atom is isolated by Sb atoms, and thus the Pt1Sb1 alloy exhibits high selectivity in propane dehydrogenation reaction resulting from the geometric effect that minimizes the hydrogenolysis side reaction.",

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AU - Ye, Chenliang

AU - Wu, Zhenwei

AU - Liu, Wei

AU - Ren, Yang

AU - Zhang, Guanghui

AU - Miller, Jeffrey T.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - A new tetragonal Pt1Sb1 phase not known in phase diagram was evidenced in 2-3 nm core-shell nanoparticle catalysts by in situ synchrotron XAS, XRD, HAADF imaging, and EDS analysis. A kinetically controlled diffusion of Sb(0) into Pt(0) nanoparticles with minimum atomic rearrangement of the FCC Pt structure was proposed to explain the formation of this unique phase on top of a Pt core at the nanoscale. Each Pt atom is isolated by Sb atoms, and thus the Pt1Sb1 alloy exhibits high selectivity in propane dehydrogenation reaction resulting from the geometric effect that minimizes the hydrogenolysis side reaction.

AB - A new tetragonal Pt1Sb1 phase not known in phase diagram was evidenced in 2-3 nm core-shell nanoparticle catalysts by in situ synchrotron XAS, XRD, HAADF imaging, and EDS analysis. A kinetically controlled diffusion of Sb(0) into Pt(0) nanoparticles with minimum atomic rearrangement of the FCC Pt structure was proposed to explain the formation of this unique phase on top of a Pt core at the nanoscale. Each Pt atom is isolated by Sb atoms, and thus the Pt1Sb1 alloy exhibits high selectivity in propane dehydrogenation reaction resulting from the geometric effect that minimizes the hydrogenolysis side reaction.

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JO - Chemistry of Materials

JF - Chemistry of Materials

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