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Atomically dispersed catalysts have been shown highly active for preferential oxidation of carbon monoxide in the presence of excess hydrogen (PROX). However, their stability has been less than ideal. We show here that the introduction of a structural component to minimize diffusion of the active metal center can greatly improve the stability without compromising the activity. Using an Ir dinuclear heterogeneous catalyst (DHC) as a study platform, we identify two types of oxygen species, interfacial and bridge, that work in concert to enable both activity and stability. The work sheds important light on the synergistic effect between the active metal center and the supporting substrate and may find broad applications for the use of atomically dispersed catalysts.
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High-area alumina supported Cu–Ce atomic species for water–gas shift reaction
Atomically dispersed cerium species, anchored to high-area alumina by unsaturated penta-coordinated aluminum, strongly interact with atomically dispersed Cu species to provide active centers for water–gas shift reaction (WGSR).
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- Award ID(s):
- 2247571
- PAR ID:
- 10595868
- Publisher / Repository:
- The Royal Society of Chemistry (RSC)
- Date Published:
- Journal Name:
- Chemical Communications
- Volume:
- 60
- Issue:
- 68
- ISSN:
- 1359-7345
- Page Range / eLocation ID:
- 9093 to 9096
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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- Free Publicly Accessible Full Text
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Accepted Manuscript1.0
- Journal Article:
- https://doi.org/10.1039/D4CC01023J
