AI Article Synopsis
- Au/CeO(2) catalysts are effective for CO oxidation and water-gas shift reactions but suffer from rapid deactivation due to gold nanoparticle sintering.
- Research shows that 2-4 nm gold particles on rod-shaped CeO(2) remain stable and active even under varying reaction conditions, without sintering up to 573 K.
- The study highlights the potential for stabilizing gold nanoparticles by improving the interface with ceria, which could be applied to other metal nanocatalysts supported on oxides.
Article Abstract
Au/CeO(2) catalysts are highly active for low-temperature CO oxidation and water-gas shift reaction, but they deactivate rapidly because of sintering of gold nanoparticles, linked to the collapse or restructuring of the gold-ceria interfacial perimeters. To date, a detailed atomic-level insight into the restructuring of the active gold-ceria interfaces is still lacking. Here, we report that gold particles of 2-4 nm size, strongly anchored onto rod-shaped CeO(2), are not only highly active but also distinctively stable under realistic reaction conditions. Environmental transmission electron microscopy analyses identified that the gold nanoparticles, in response to alternating oxidizing and reducing atmospheres, changed their shapes but did not sinter at temperatures up to 573 K. This finding offers a new strategy to stabilize gold nanoparticles on ceria by engineering the gold-ceria interfacial structure, which could be extended to other oxide-supported metal nanocatalysts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/ja310341j | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!