Hydride Formation Diminishes CO 2 Reduction Rate on Palladium
| Autor: | Emanuel Billeter, Jasmin Terreni, Andreas Borgschulte |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Hydrogen Hydride Reduction rate chemistry.chemical_element Infrared spectroscopy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 7. Clean energy Atomic and Molecular Physics and Optics Dissociation (chemistry) 0104 chemical sciences Catalysis chemistry Physics::Atomic Physics Physical and Theoretical Chemistry 0210 nano-technology Catalytic hydrogenation Palladium |
| Zdroj: | ChemPhysChem. 20:1398-1403 |
| ISSN: | 1439-7641 1439-4235 |
| DOI: | 10.1002/cphc.201801081 |
| Popis: | The catalytic hydrogenation of CO2 includes the dissociation of hydrogen and further reaction with CO2 and intermediates. We investigate how the amount of hydrogen in the bulk of the catalyst affects the hydrogenation reaction taking place at the surface. For this, we developed an experimental setup described herein, based on a magnetic suspension balance and an infrared spectrometer, and measured pressure-composition isotherms of the Pd-H system under conditions relevant for CO2 reduction. The addition of CO2 has no influence on the measured hydrogen absorption isotherms. The pressure dependence of the CO formation rate changes suddenly upon formation of the β-PdH phase. This effect is attributed to a smaller surface coverage of hydrogen due to repulsive electronic interactions affecting both bulk and surface hydrogen. |
| Databáze: | OpenAIRE |
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