Resolving multifrequential oscillations and nanoscale interfacet communication in single-particle catalysis
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- Y. Suchorski
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
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- J. Zeininger
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
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- S. Buhr
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
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- M. Raab
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
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- M. Stöger-Pollach
- University Service Center for Transmission Electron Microscopy, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
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- J. Bernardi
- University Service Center for Transmission Electron Microscopy, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria.
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- H. Grönbeck
- Department of Physics and Competence Centre for Catalysis, Chalmers University of Technology, 41296 Göteborg, Sweden.
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- G. Rupprechter
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria.
説明
<jats:title>Imaging reactions across facets</jats:title> <jats:p> Metal nanoparticles used in heterogeneous catalysis can bear different facets with different reaction kinetics. Suchorski <jats:italic>et al.</jats:italic> used field electron microscopy with high spatial (∼2 nanometers) and time (∼2 milliseconds) resolution to study hydrogen oxidation on a curved rhodium crystal that displayed individual nanofacets. They also performed field ion microscopy of the water products. Periodic formation and depletion of subsurface oxygen blocked or allowed hydrogen adsorption, respectively, and led to oscillatory kinetics that could frequency lock between facets but at different frequencies. Surface reconstructions could also induce collapse of spatial coupling of oscillations. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , abf8107, this issue p. <jats:related-article issue="6548" page="1314" related-article-type="in-this-issue" vol="372">1314</jats:related-article> </jats:p>
収録刊行物
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- Science
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Science 372 (6548), 1314-1318, 2021-06-18
American Association for the Advancement of Science (AAAS)