Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts

Kunlun Ding, Ahmet Gulec, Alexis M. Johnson, Neil M. Schweitzer, Galen D. Stucky, Laurence D. Marks, Peter C Stair

Research output: Contribution to journalArticle

276 Citations (Scopus)

Abstract

Identification and characterization of catalytic active sites are the prerequisites for an atomic-level understanding of the catalytic mechanism and rational design of highperformance heterogeneous catalysts. Indirect evidence in recent reports suggests that platinum (Pt) single atoms are exceptionally active catalytic sites. We demonstrate that infrared spectroscopy can be a fast and convenient characterization method with which to directly distinguish and quantify Pt single atoms from nanoparticles. In addition, we directly observe that only Pt nanoparticles show activity for carbon monoxide (CO) oxidation and water-gas shift at low temperatures, whereas Pt single atoms behave as spectators. The lack of catalytic activity of Pt single atoms can be partly attributed to the strong binding of CO molecules.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalScience
Volume350
Issue number6257
DOIs
Publication statusPublished - Oct 9 2015

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Water gas shift
Carbon Monoxide
Platinum
Oxidation
Catalysts
Atoms
Nanoparticles
Infrared spectroscopy
Catalyst activity
Thermodynamic properties
Molecules
Temperature

ASJC Scopus subject areas

  • General

Cite this

Ding, K., Gulec, A., Johnson, A. M., Schweitzer, N. M., Stucky, G. D., Marks, L. D., & Stair, P. C. (2015). Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts. Science, 350(6257), 189-192. https://doi.org/10.1126/science.aac6368

Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts. / Ding, Kunlun; Gulec, Ahmet; Johnson, Alexis M.; Schweitzer, Neil M.; Stucky, Galen D.; Marks, Laurence D.; Stair, Peter C.

In: Science, Vol. 350, No. 6257, 09.10.2015, p. 189-192.

Research output: Contribution to journalArticle

Ding, K, Gulec, A, Johnson, AM, Schweitzer, NM, Stucky, GD, Marks, LD & Stair, PC 2015, 'Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts', Science, vol. 350, no. 6257, pp. 189-192. https://doi.org/10.1126/science.aac6368
Ding K, Gulec A, Johnson AM, Schweitzer NM, Stucky GD, Marks LD et al. Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts. Science. 2015 Oct 9;350(6257):189-192. https://doi.org/10.1126/science.aac6368
Ding, Kunlun ; Gulec, Ahmet ; Johnson, Alexis M. ; Schweitzer, Neil M. ; Stucky, Galen D. ; Marks, Laurence D. ; Stair, Peter C. / Identification of active sites in CO oxidation and water-gas shift over supported Pt catalysts. In: Science. 2015 ; Vol. 350, No. 6257. pp. 189-192.
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