AI Article Synopsis
- Catalytic steam reforming of methane for hydrogen production is effective at low temperatures (473 K) with a 1 wt% Pd/CeO catalyst when an electric field is applied, due to surface protonics.
- Kinetic analyses show a strong interaction between the catalytic reaction and the electric field, which enhances the reaction's rate and reduces the activation energy needed.
- Operando-IR measurements indicate that proton conduction via adsorbed water on the catalyst surface is crucial for activating methane at low temperatures, marking the first report on the promotion of this catalytic reaction through surface protonics.
Article Abstract
Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO catalyst in an electric field, thanks to the surface protonics. Kinetic analyses demonstrated the synergetic effect between catalytic reaction and electric field, revealing strengthened water pressure dependence of the reaction rate when applying an electric field, with one-third the apparent activation energy at the lower reaction temperature range. Operando-IR measurements revealed that proton conduction via adsorbed water on the catalyst surface occurred during electric field application. Methane was activated by proton collision at the Pd-CeO interface, based on the inverse kinetic isotope effect. Proton conduction on the catalyst surface plays an important role in methane activation at low temperature. This report is the first describing promotion of the catalytic reaction by surface protonics.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5131306 | PMC |
| http://dx.doi.org/10.1038/srep38007 | DOI Listing |
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