Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation
National Institute of Standards and Technology · Lehigh University · +2 more institutions
Abstract
Gold nanocrystals absorbed on metal oxides have exceptional properties in oxidation catalysis, including the oxidation of carbon monoxide at ambient temperatures, but the identification of the active catalytic gold species among the many present on real catalysts is challenging. We have used aberration-corrected scanning transmission electron microscopy to analyze several iron oxide-supported catalyst samples, ranging from those with little or no activity to others with high activities. High catalytic activity for carbon monoxide oxidation is correlated with the presence of bilayer clusters that are approximately 0.5 nanometer in diameter and contain only approximately 10 gold atoms. The activity of these…
Citation impact
- FWCI
- 48.85
- Percentile
- 100%
- References
- 28
Authors
5- AAAndrew A. Herzing
National Institute of Standards and Technology, Lehigh University, Cardiff University, Cardiff Metropolitan University
- CJChristopher J. KielyCorresponding
National Institute of Standards and Technology, Lehigh University, Cardiff University, Cardiff Metropolitan University
- AFAlbert F. Carley
National Institute of Standards and Technology, Lehigh University, Cardiff University, Cardiff Metropolitan University
- PLPhilip Landon
National Institute of Standards and Technology, Lehigh University, Cardiff University, Cardiff Metropolitan University
- GJGraham J. HutchingsCorresponding
National Institute of Standards and Technology, Lehigh University, Cardiff University, Cardiff Metropolitan University
Topics & keywords
- Nanoclusters
- Catalysis
- Carbon monoxide
- Bilayer
- Oxide
- Iron oxide
- Metal
- Transmission electron microscopy