Noncrystalline-to-crystalline transformations in pt nanoparticles

Long Li; Lin Lin Wang; Duane D. Johnson; Zhongfan Zhang; Sergio I. Sanchez; Joo H. Kang; Ralph G. Nuzzo; Qi Wang; Anatoly I. Frenkel; Jie Li; James Ciston; Eric A. Stach; Judith C. Yang

doi:10.1021/ja405497p

Noncrystalline-to-crystalline transformations in pt nanoparticles

Long Li, Lin Lin Wang, Duane D. Johnson, Zhongfan Zhang, Sergio I. Sanchez, Joo H. Kang, Ralph G. Nuzzo, Qi Wang, Anatoly I. Frenkel, Jie Li, James Ciston, Eric A. Stach, Judith C. Yang

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Abstract

We show that the noncrystalline-to-crystalline transition of supported Pt nanoparticles (NPs) in the subnanometer to nanometer size range is statistical in nature, and strongly affected by particle size, support, and adsorbates (here we use H₂). Unlike in the bulk, a noncrystalline phase exists and is stable in small NPs, reflecting a general mesoscopic feature. Observations of >3000 particles by high-resolution transmission electron microscopy show a noncrystalline-to-crystalline transition zone that is nonabrupt; there is a size regime where disordered and ordered NPs coexist. The NP size at which this transition occurs is strongly dependent on both the adsorbate and the support, and this effect is general for late 5d transition metals. All results are reconciled via a statistical description of particle-support-adsorbate interactions.

Original language	English (US)
Pages (from-to)	13062-13072
Number of pages	11
Journal	Journal of the American Chemical Society
Volume	135
Issue number	35
DOIs	https://doi.org/10.1021/ja405497p
State	Published - Sep 4 2013

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja405497p

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title = "Noncrystalline-to-crystalline transformations in pt nanoparticles",

abstract = "We show that the noncrystalline-to-crystalline transition of supported Pt nanoparticles (NPs) in the subnanometer to nanometer size range is statistical in nature, and strongly affected by particle size, support, and adsorbates (here we use H2). Unlike in the bulk, a noncrystalline phase exists and is stable in small NPs, reflecting a general mesoscopic feature. Observations of >3000 particles by high-resolution transmission electron microscopy show a noncrystalline-to-crystalline transition zone that is nonabrupt; there is a size regime where disordered and ordered NPs coexist. The NP size at which this transition occurs is strongly dependent on both the adsorbate and the support, and this effect is general for late 5d transition metals. All results are reconciled via a statistical description of particle-support-adsorbate interactions.",

author = "Long Li and Wang, {Lin Lin} and Johnson, {Duane D.} and Zhongfan Zhang and Sanchez, {Sergio I.} and Kang, {Joo H.} and Nuzzo, {Ralph G.} and Qi Wang and Frenkel, {Anatoly I.} and Jie Li and James Ciston and Stach, {Eric A.} and Yang, {Judith C.}",

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doi = "10.1021/ja405497p",

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T1 - Noncrystalline-to-crystalline transformations in pt nanoparticles

AU - Li, Long

AU - Wang, Lin Lin

AU - Johnson, Duane D.

AU - Zhang, Zhongfan

AU - Sanchez, Sergio I.

AU - Kang, Joo H.

AU - Nuzzo, Ralph G.

AU - Wang, Qi

AU - Frenkel, Anatoly I.

AU - Li, Jie

AU - Ciston, James

AU - Stach, Eric A.

AU - Yang, Judith C.

PY - 2013/9/4

Y1 - 2013/9/4

N2 - We show that the noncrystalline-to-crystalline transition of supported Pt nanoparticles (NPs) in the subnanometer to nanometer size range is statistical in nature, and strongly affected by particle size, support, and adsorbates (here we use H2). Unlike in the bulk, a noncrystalline phase exists and is stable in small NPs, reflecting a general mesoscopic feature. Observations of >3000 particles by high-resolution transmission electron microscopy show a noncrystalline-to-crystalline transition zone that is nonabrupt; there is a size regime where disordered and ordered NPs coexist. The NP size at which this transition occurs is strongly dependent on both the adsorbate and the support, and this effect is general for late 5d transition metals. All results are reconciled via a statistical description of particle-support-adsorbate interactions.

AB - We show that the noncrystalline-to-crystalline transition of supported Pt nanoparticles (NPs) in the subnanometer to nanometer size range is statistical in nature, and strongly affected by particle size, support, and adsorbates (here we use H2). Unlike in the bulk, a noncrystalline phase exists and is stable in small NPs, reflecting a general mesoscopic feature. Observations of >3000 particles by high-resolution transmission electron microscopy show a noncrystalline-to-crystalline transition zone that is nonabrupt; there is a size regime where disordered and ordered NPs coexist. The NP size at which this transition occurs is strongly dependent on both the adsorbate and the support, and this effect is general for late 5d transition metals. All results are reconciled via a statistical description of particle-support-adsorbate interactions.

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JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 35

ER -

Noncrystalline-to-crystalline transformations in pt nanoparticles

Abstract

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