On the Promotion of Catalytic Reactions by Surface Acoustic Waves
Abstract: Surface acoustic waves (SAW) allow to manipulate surfaces with potential applications in catalysis, sensor and nanotechnology. SAWs were shown to cause a strong increase in catalytic activity and selectivity in many oxidation and decomposition reactions on metallic and oxidic catalysts. However, the promotion mechanism has not been unambiguously identified. Using stroboscopic X‐ray photoelectron spectro‐microscopy, we were able to evidence a sub‐nanosecond work function change during propagation of 500 MHz SAWs on a 9 nm thick platinum film. We quantify the work function change to 455 μeV. Such a small variation rules out that electronic effects due to elastic deformation (strain) play a major role in the SAW‐induced promotion of catalysis. In a second set of experiments, SAW‐induced intermixing of a five monolayers thick Rh film on top of polycrystalline platinum was demonstrated to be due to enhanced thermal diffusion caused by an increase of the surface temperature by about 75 K when SAWs were excited. Reversible surface structural changes are suggested to be a major cause for catalytic promotion.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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On the Promotion of Catalytic Reactions by Surface Acoustic Waves ; volume:59 ; number:45 ; year:2020 ; pages:20224-20229 ; extent:6
Angewandte Chemie / International edition. International edition ; 59, Heft 45 (2020), 20224-20229 (gesamt 6)
- Creator
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von Boehn, Bernhard
Foerster, Michael
von Boehn, Moritz
Prat, Jordi
Macià, Ferran
Casals, Blai
Khaliq, Muhammad Waqas
Hernández‐Mínguez, Alberto
Aballe, Lucia
Imbihl, Ronald
- DOI
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10.1002/anie.202005883
- URN
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urn:nbn:de:101:1-2022061906562355859416
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:25 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- von Boehn, Bernhard
- Foerster, Michael
- von Boehn, Moritz
- Prat, Jordi
- Macià, Ferran
- Casals, Blai
- Khaliq, Muhammad Waqas
- Hernández‐Mínguez, Alberto
- Aballe, Lucia
- Imbihl, Ronald
Other Objects (12)
On the Promotion of Catalytic Reactions by Surface Acoustic Waves
Catalytic reactions
Catalytic asymmetric conjugate reactions
Catalytic cross coupling reactions
Imaging of surface acoustic waves
Fluctuations in catalytic surface reactions
Nonlinear surface acoustic waves in solids
Gyroscopes based on surface acoustic waves
The 2019 surface acoustic waves roadmap
Microkinetic Modeling to Decode Catalytic Reactions and Empower Catalytic Design
Resonance forcing in catalytic surface reactions
Catalytic Conia-ene and related reactions
On the Promotion of Catalytic Reactions by Surface Acoustic Waves
Catalytic reactions
Catalytic asymmetric conjugate reactions
Catalytic cross coupling reactions
Imaging of surface acoustic waves
Fluctuations in catalytic surface reactions
Nonlinear surface acoustic waves in solids
Gyroscopes based on surface acoustic waves
The 2019 surface acoustic waves roadmap
Microkinetic Modeling to Decode Catalytic Reactions and Empower Catalytic Design
Resonance forcing in catalytic surface reactions
Catalytic Conia-ene and related reactions
On the Promotion of Catalytic Reactions by Surface Acoustic Waves
Catalytic reactions
Catalytic asymmetric conjugate reactions
Catalytic cross coupling reactions
Imaging of surface acoustic waves
Fluctuations in catalytic surface reactions
Nonlinear surface acoustic waves in solids
Gyroscopes based on surface acoustic waves
The 2019 surface acoustic waves roadmap
Microkinetic Modeling to Decode Catalytic Reactions and Empower Catalytic Design
Resonance forcing in catalytic surface reactions