The role of the electric field and surface protonics on low temperature catalytic dry reforming of methane was investigated over 1 wt % Ni/10 mol %La-ZrO 2 catalyst, which shows very high catalytic activity even at temperatures as low as 473 K. We investigated kinetic analyses using isotope and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and kinetic analyses revealed synergetic effects between the catalytic reaction and the electric field with less than one-fifth the apparent activation energy at low reaction temperatures. Results of kinetic investigations using isotopes such as CD 4 and 18 O 2 , in situ DRIFTS in the electric field, and density functional theory calculation indicate that methane dry reforming proceeds well by virtue of surface protonics. CH 4 and CO 2 were activated by proton collision at the Ni−La-ZrO 2 interface based on the "inverse" kinetic isotope effect.

10wt%Ni−10wt%Mg−La 0.1 Zr 0.9 O 2−x (LZO) catalyst shows high reforming activity of methane while suppressing methane combustion on trireforming of methane at low temperatures of 473 K in an electric field. On the basis of results of light-on and light-off tests for methane oxidation and temperature dependencies for catalytic methane steam reforming activity with or without the electric field, we found that Mg addition to 10wt%Ni−LZO catalyst suppresses methane combustion, while the methane steam reforming proceeds well by virtue of surface protonics in the electric field. Ni 2+ on 10wt%Ni−10wt%Mg−LZO catalyst was more cationic than that on 10wt%Ni−LZO catalyst, and NiO−MgO solid solution formed on LZO support played an important role in combustion suppression.

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