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Coupling of morphological instability and kinetic instability: Chemical waves in hydrogen oxidation on a bimetallic Ni/Rh(111) surface
- Source :
- Physical Review Materials
- Publication Year :
- 2021
- Publisher :
- American Physical Society (APS), 2021.
-
Abstract
- The oxidation and reduction of a bimetallic Ni/Rh model catalyst during the water forming ${\mathrm{O}}_{2}+{\mathrm{H}}_{2}$ reaction is studied with low-energy electron microscopy, microspot-low-energy electron diffraction, and x-ray photoemission electron microscopy. Oxidation of a submonolayer Ni film results in the formation of three-dimensional (3D) NiO nanoparticles. Reduction of 3D-NiO in ${\mathrm{H}}_{2}$ produces a dispersed two-dimensional film of metallic Ni. Chemical waves during the ${\mathrm{O}}_{2}+{\mathrm{H}}_{2}$ reaction involve a cyclic transformation between 3D-NiO and 2D-NiO.
- Subjects :
- Materials science
Physics and Astronomy (miscellaneous)
02 engineering and technology
021001 nanoscience & nanotechnology
Coupling (probability)
Kinetic energy
01 natural sciences
Redox
Catalysis
Metal
Photoemission electron microscopy
Crystallography
Electron diffraction
visual_art
0103 physical sciences
visual_art.visual_art_medium
General Materials Science
010306 general physics
0210 nano-technology
Bimetallic strip
Subjects
Details
- ISSN :
- 24759953
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- Physical Review Materials
- Accession number :
- edsair.doi.dedup.....2b26424723268cab6d12d59f6377c7c9