Propane oxidation over Pt/SrTiO3 nanocuboids

James A. Enterkin; Worajit Setthapun; Jeffrey W. Elam; Steven T. Christensen; Federico A. Rabuffetti; Laurence D. Marks; Peter C. Stair; Kenneth R. Poeppelmeier; Christopher L. Marshall

doi:10.1021/cs200092c

Propane oxidation over Pt/SrTiO₃ nanocuboids

James A. Enterkin, Worajit Setthapun, Jeffrey W. Elam, Steven T. Christensen, Federico A. Rabuffetti, Laurence D. Marks, Peter C. Stair, Kenneth R. Poeppelmeier, Christopher L. Marshall

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

152 Scopus citations

Abstract

Pt/SrTiO₃ shows promise as a low temperature hydrocarbon combustion catalyst for automotive applications. In this study, SrTiO ₃ nanocuboid supports were synthesized using sol-precipitation coupled with hydrothermal synthesis, and platinum was deposited on the nanocuboids with 1, 3, and 5 cycles of atomic layer deposition (ALD). The platinum particles have a highly uniform distribution both before and after reaction testing, and range from 1 to 5 nm in size, depending upon the number of ALD cycles. These materials have a >50 °C lower light-off temperature for propane oxidation than a conventional Pt/Al₂O₃ catalyst, turn over frequencies up to 3 orders of magnitude higher, and show improved resistance to deactivation. The increased activity is attributed to the stabilization of a Pt/PtO core/shell structure during operating conditions by the strong epitaxy between the Pt and the SrTiO₃ support.

Original language	English (US)
Pages (from-to)	629-635
Number of pages	7
Journal	ACS Catalysis
Volume	1
Issue number	6
DOIs	https://doi.org/10.1021/cs200092c
State	Published - Jun 3 2011

Keywords

SrTiO
atomic layer deposition
nanocrystal support
nanoparticle catalysis
platinum
propane oxidation

ASJC Scopus subject areas

Catalysis
General Chemistry

Access to Document

10.1021/cs200092c

Cite this

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title = "Propane oxidation over Pt/SrTiO3 nanocuboids",

abstract = "Pt/SrTiO3 shows promise as a low temperature hydrocarbon combustion catalyst for automotive applications. In this study, SrTiO 3 nanocuboid supports were synthesized using sol-precipitation coupled with hydrothermal synthesis, and platinum was deposited on the nanocuboids with 1, 3, and 5 cycles of atomic layer deposition (ALD). The platinum particles have a highly uniform distribution both before and after reaction testing, and range from 1 to 5 nm in size, depending upon the number of ALD cycles. These materials have a >50 °C lower light-off temperature for propane oxidation than a conventional Pt/Al2O3 catalyst, turn over frequencies up to 3 orders of magnitude higher, and show improved resistance to deactivation. The increased activity is attributed to the stabilization of a Pt/PtO core/shell structure during operating conditions by the strong epitaxy between the Pt and the SrTiO3 support.",

keywords = "SrTiO, atomic layer deposition, nanocrystal support, nanoparticle catalysis, platinum, propane oxidation",

author = "Enterkin, {James A.} and Worajit Setthapun and Elam, {Jeffrey W.} and Christensen, {Steven T.} and Rabuffetti, {Federico A.} and Marks, {Laurence D.} and Stair, {Peter C.} and Poeppelmeier, {Kenneth R.} and Marshall, {Christopher L.}",

year = "2011",

month = jun,

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doi = "10.1021/cs200092c",

language = "English (US)",

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T1 - Propane oxidation over Pt/SrTiO3 nanocuboids

AU - Enterkin, James A.

AU - Setthapun, Worajit

AU - Elam, Jeffrey W.

AU - Christensen, Steven T.

AU - Rabuffetti, Federico A.

AU - Marks, Laurence D.

AU - Stair, Peter C.

AU - Poeppelmeier, Kenneth R.

AU - Marshall, Christopher L.

PY - 2011/6/3

Y1 - 2011/6/3

N2 - Pt/SrTiO3 shows promise as a low temperature hydrocarbon combustion catalyst for automotive applications. In this study, SrTiO 3 nanocuboid supports were synthesized using sol-precipitation coupled with hydrothermal synthesis, and platinum was deposited on the nanocuboids with 1, 3, and 5 cycles of atomic layer deposition (ALD). The platinum particles have a highly uniform distribution both before and after reaction testing, and range from 1 to 5 nm in size, depending upon the number of ALD cycles. These materials have a >50 °C lower light-off temperature for propane oxidation than a conventional Pt/Al2O3 catalyst, turn over frequencies up to 3 orders of magnitude higher, and show improved resistance to deactivation. The increased activity is attributed to the stabilization of a Pt/PtO core/shell structure during operating conditions by the strong epitaxy between the Pt and the SrTiO3 support.

AB - Pt/SrTiO3 shows promise as a low temperature hydrocarbon combustion catalyst for automotive applications. In this study, SrTiO 3 nanocuboid supports were synthesized using sol-precipitation coupled with hydrothermal synthesis, and platinum was deposited on the nanocuboids with 1, 3, and 5 cycles of atomic layer deposition (ALD). The platinum particles have a highly uniform distribution both before and after reaction testing, and range from 1 to 5 nm in size, depending upon the number of ALD cycles. These materials have a >50 °C lower light-off temperature for propane oxidation than a conventional Pt/Al2O3 catalyst, turn over frequencies up to 3 orders of magnitude higher, and show improved resistance to deactivation. The increased activity is attributed to the stabilization of a Pt/PtO core/shell structure during operating conditions by the strong epitaxy between the Pt and the SrTiO3 support.

KW - SrTiO

KW - atomic layer deposition

KW - nanocrystal support

KW - nanoparticle catalysis

KW - platinum

KW - propane oxidation

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