Abstract: Reforming of CH₄ with CO₂ to give syngas over Ni/SiO₂, Co/SiO₂ and Ni Co/SiO₂ catalysts has been studied by activity evaluation using TPO, TPR and CO₂-TPD techniques.It is found that the catalysts without pre reduction decreased in their activities following the order of Ni Co/SiO₂~Ni/SiO₂>>Co/SiO₂, and Ni Co/SiO₂ was much less sensitive to coking and more stable than Ni/SiO₂ catalyst.The CH₄ conversion over Ni Co/SiO₂ catalyst increased with time in stream during the first 1 h period of reaction and then remained invariable with time in stream for 9 h, while over Ni/SiO₂ catalyst the CH₄ conversion decreased continuously with reaction time and the reaction had to be stopped because of the reactor becoming completely plugged by carbon deposits after 6 h.In the case of Ni Co/SiO₂ catalyst, Ni promoted the reduction of Co species, which was found beneficial to CO₂ adsorption and suppression of less active carbon deposition.This is considered to be related to the excellent activity, stability and anti coking property of the bimetallic catalyst.