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Surface Protonics Promotes Catalysis

Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO(2) 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 pre...

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Detalles Bibliográficos
Autores principales: Manabe, R., Okada, S., Inagaki, R., Oshima, K., Ogo, S., Sekine, Y.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5131306/
https://www.ncbi.nlm.nih.gov/pubmed/27905505
http://dx.doi.org/10.1038/srep38007
Descripción
Sumario:Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO(2) 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(2) 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.