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 journalArticle

105 Citations (Scopus)

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 languageEnglish
Pages (from-to)629-635
Number of pages7
JournalACS Catalysis
Volume1
Issue number6
DOIs
Publication statusPublished - Jun 3 2011

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Keywords

  • SrTiO
  • atomic layer deposition
  • nanocrystal support
  • nanoparticle catalysis
  • platinum
  • propane oxidation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Cite this

Enterkin, J. A., Setthapun, W., Elam, J. W., Christensen, S. T., Rabuffetti, F. A., Marks, L. D., Stair, P. C., Poeppelmeier, K. R., & Marshall, C. L. (2011). Propane oxidation over Pt/SrTiO3 nanocuboids. ACS Catalysis, 1(6), 629-635. https://doi.org/10.1021/cs200092c