Catalytic Chemical Vapor Deposition of Methane to Carbon Nanotubes: Copper Promoted Effect of Ni/MgO Catalysts

Figure 5

TG and DTA curves of the obtained products from the catalysts (a) Ni/MgO and (b) Ni-Cu/MgO calcined at 500°C with reaction temperature 650°C.

(a)

(b)