One-step facile method to prepare Ni/MgO-Al₂O₃ catalysts via high frequency cold plasma in N₂, H₂ or N₂/H₂ atmosphere for CO₂ reforming with CH₄

With the increasingly serious situation of air pollution, catalytic conversion has become a hot research direction, and the efforts were focused on the preparation of catalysts greenly and effectively. The catalysts were prepared by plasma-assisted method in our work. Different gases were introduced to the plasma system. The catalyst treated by a mixture of nitrogen and hydrogen plasma (PNH) catalyst behaved badly in activity and coke resistance, but the hydrogen plasma (PH) and nitrogen plasma (PN) samples displayed fine activity. The catalyst treated by nitrogen plasma (PN) exhibited high activity compared to the C sample. The amount of coke over PN sample was less than that of the NMA-PH catalyst. Whereas, the PN catalyst presented as good activity and coke resistance in carbon dioxide reforming with methane as the conventional calcined catalyst.