title: Surface Protonics Promotes Catalysis.
abstract: Catalytic steam reforming of methane for hydrogen production proceeds even at 473 K over 1 wt% Pd/CeO2catalyst 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-CeO2interface, 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.
authors.affiliation: Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Manabe
authors.affiliation: Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Okada
authors.affiliation: Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Inagaki
authors.affiliation: Chemistry and Biochemistry, National Institute of Technology, Numazu College, 3600, Ooka, Numazu, Shizuoka, 410-8501, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Oshima
authors.affiliation: Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ogo
authors.affiliation: Applied Chemistry, Waseda University, 3-4-1, Okubo, Shinjuku, Tokyo, 169-8555, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Sekine