Oxidation-Induced Structural Changes in Sub-Nanometer Platinum Supported on Alumina

Melanie Moses-DeBusk; Lawrence F. Allard; Douglas A. Blom; Chaitanya K. Narula

doi:10.1002/cctc.201500267

Oxidation-Induced Structural Changes in Sub-Nanometer Platinum Supported on Alumina

Melanie Moses-DeBusk
, Lawrence F. Allard
, Douglas A. Blom
, Chaitanya K. Narula

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Pt supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of Pt particles supported on a variety of supports have been studied extensively; however, available experimental information on the behavior of single versus sub-nanometer Pt is extremely limited. To bridge the knowledge gap between single supported Pt and well-formed supported Pt nanoparticles, we have performed the synthesis, characterization, and CO and NO oxidation studies of sub-nanometer Pt supported on α-, θ-, and γ-Al₂O₃ and monitored the changes in structure upon exposure to CO and NO oxidation conditions. We find that sub-nanometer Pt is highly effective for CO oxidation because of the high Pt dispersion, but it is not very efficient as a NO oxidation catalyst. Furthermore, sub-nanometer Pt agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.

Original language	English
Pages (from-to)	2391-2396
Number of pages	6
Journal	ChemCatChem
Volume	7
Issue number	15
DOIs	https://doi.org/10.1002/cctc.201500267
State	Published - Aug 1 2015

Keywords

aluminum
oxidation
platinum
scanning probe microscopy
supported catalysts

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10.1002/cctc.201500267

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title = "Oxidation-Induced Structural Changes in Sub-Nanometer Platinum Supported on Alumina",

abstract = "Pt supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of Pt particles supported on a variety of supports have been studied extensively; however, available experimental information on the behavior of single versus sub-nanometer Pt is extremely limited. To bridge the knowledge gap between single supported Pt and well-formed supported Pt nanoparticles, we have performed the synthesis, characterization, and CO and NO oxidation studies of sub-nanometer Pt supported on α-, θ-, and γ-Al2O3 and monitored the changes in structure upon exposure to CO and NO oxidation conditions. We find that sub-nanometer Pt is highly effective for CO oxidation because of the high Pt dispersion, but it is not very efficient as a NO oxidation catalyst. Furthermore, sub-nanometer Pt agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.",

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doi = "10.1002/cctc.201500267",

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T1 - Oxidation-Induced Structural Changes in Sub-Nanometer Platinum Supported on Alumina

AU - Moses-DeBusk, Melanie

AU - Allard, Lawrence F.

AU - Blom, Douglas A.

AU - Narula, Chaitanya K.

PY - 2015/8/1

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N2 - Pt supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of Pt particles supported on a variety of supports have been studied extensively; however, available experimental information on the behavior of single versus sub-nanometer Pt is extremely limited. To bridge the knowledge gap between single supported Pt and well-formed supported Pt nanoparticles, we have performed the synthesis, characterization, and CO and NO oxidation studies of sub-nanometer Pt supported on α-, θ-, and γ-Al2O3 and monitored the changes in structure upon exposure to CO and NO oxidation conditions. We find that sub-nanometer Pt is highly effective for CO oxidation because of the high Pt dispersion, but it is not very efficient as a NO oxidation catalyst. Furthermore, sub-nanometer Pt agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.

AB - Pt supported on alumina is an essential component of emission treatment catalysts used in transportation. Theoretical, experimental, and mechanistic aspects of Pt particles supported on a variety of supports have been studied extensively; however, available experimental information on the behavior of single versus sub-nanometer Pt is extremely limited. To bridge the knowledge gap between single supported Pt and well-formed supported Pt nanoparticles, we have performed the synthesis, characterization, and CO and NO oxidation studies of sub-nanometer Pt supported on α-, θ-, and γ-Al2O3 and monitored the changes in structure upon exposure to CO and NO oxidation conditions. We find that sub-nanometer Pt is highly effective for CO oxidation because of the high Pt dispersion, but it is not very efficient as a NO oxidation catalyst. Furthermore, sub-nanometer Pt agglomerates rapidly under CO or NO oxidation conditions to form nanoparticles.

KW - aluminum

KW - oxidation

KW - platinum

KW - scanning probe microscopy

KW - supported catalysts

UR - https://www.scopus.com/pages/publications/84938417295

U2 - 10.1002/cctc.201500267

DO - 10.1002/cctc.201500267

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Oxidation-Induced Structural Changes in Sub-Nanometer Platinum Supported on Alumina

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Keywords

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