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Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
Published on: October 18, 2019
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Enhanced Catalysis under 2D Silica: A CO Oxidation Study
Calley N Eads1, J Anibal Boscoboinik1, Ashley R Head1
1Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA.
Angewandte Chemie (International Ed. in English)
|January 19, 2021
Summary
A 2D silica overlayer on palladium (Pd) catalysts enhances carbon monoxide (CO) oxidation. This confinement improves CO adsorption and promotes a reactive surface oxide, boosting CO2 production rates.
Area of Science:
- Surface science
- Heterogeneous catalysis
- Nanomaterials
Background:
- Interfacial confinement in 2D nanospaces modulates catalytic reaction chemistry.
- 2D materials and supports create unique microenvironments influencing kinetics and energetics.
Purpose of the Study:
- Investigate the structure-activity relationship of CO oxidation on Pd(111) with and without a 2D silica overlayer.
- Elucidate the mechanistic role of interfacial confinement in catalysis.
Main Methods:
- In situ infrared (IR) spectroscopy
- X-ray spectroscopy
- Mass spectrometry
- Utilized a bilayer silica overlayer on Pd(111) catalyst
Main Results:
- The 2D silica overlayer induced confinement effects on surface adsorbates.
- Lower and more dispersed CO adsorbate coverage with restricted geometries was observed.
- Enhanced oxygen adsorption and formation of a reactive surface oxide were promoted.
Conclusions:
- Interfacial confinement via 2D silica overlayers significantly benefits CO oxidation on Pd(111).
- Confinement optimizes adsorbate behavior, leading to increased CO2 formation rates compared to bare Pd.
Keywords:
CO oxidationchemistry in confined spacesheterogeneous catalysismicroporous filmtwo-dimensional materialMore Related Videos
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