Formation of the NiCrO_x/MgO and Ni/MgO Catalysts
for Carbon Dioxide Reforming of Methane

V. Yu. Bychkov, V. N. Korchak, O. V. Krylov, O. S. Morozova, and T. I. Khomenko

Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 117977 Russia

Received February 24, 2000

Abstract—Temperature-programmed reduction by hydrogen, temperature-programmed desorption of O₂,
local X-ray spectral analysis, and scanning electron microscopy are used to study redox processes occurring on
the Ni–Cr₂O₃/MgO and Ni/MgO catalysts for carbon dioxide reforming of methane. The reduction of Ni/MgO
leads to the formation of nickel clusters distributed over the surface of MgO. During the reduction of
NiOCr₂O₃/MgO, chromates are transformed into chromites, and then nickel is formed by the reduction of
spinel NiCr₂O₄. Reoxidation leads to the oxidized structures NiO, NiCr₂O₄, and NiCrO₄.

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.