The activities of Ni catalysts with different supports in methane decomposition have been studied. The activity order of the catalysts is Ni/SiO 2>Ni/MgO-Al 2O 3>Ni/CaO-Al 2O 3>Ni/α-Al 2O 3 and the interaction between Ni and the support is in the order of Ni/SiO 2
