The partial oxidation of methane is studied at 673-873 K over new Ru-based catalysts supported on TiO2-ZrO2 with different TiO2 content. Supports were prepared by a sol-gel method, and RuCl3 and RuNO(NO3)(3) were used as ruthenium precursors to prepare the catalysts (1-2 wt% Ru). The effect of the reaction temperature on the catalytic behavior is analyzed, along with the support composition and the Ru precursor used. (C) 2009 Elsevier B.V. All rights reserved.