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Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies
Published on: July 15, 2013
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Water facilitates oxygen migration on gold surfaces
Fang Xu1, Ioanna Fampiou, Christopher R O'Connor
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138, USA. friend@fas.harvard.edu.
Physical Chemistry Chemical Physics : PCCP
|December 14, 2017
Summary
Water enables atomic oxygen migration on gold surfaces, revealing dynamic adsorption. This finding, demonstrated using advanced techniques, highlights water
Area of Science:
- Surface Science
- Heterogeneous Catalysis
- Physical Chemistry
Background:
- The water-oxygen-gold interface is crucial for surface processes.
- Understanding oxygen dynamics on gold surfaces is key for catalysis.
Purpose of the Study:
- To investigate the role of water in atomic oxygen migration on Au(110).
- To elucidate the dynamic nature of surface adsorption at the water-oxygen-gold interface.
Main Methods:
- In situ scanning tunnelling microscopy (STM)
- Temperature-programmed reaction spectroscopy (TPRS)
- First-principles theoretical calculations
- Isotopic exchange experiments
Main Results:
- Water facilitates atomic oxygen migration on Au(110).
- Water maintains high oxygen dispersion and facilitates oxygen exchange.
- Transient hydroxyl formation and recombination drive oxygen migration.
Conclusions:
- Water creates a dynamic Au(110) surface with mobile oxygen species.
- This dynamic behavior can enhance gold catalysis in oxidation reactions.
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