Effect of CexZr1-xO₂ Promoter on Ni-Based SBA-15 Catalyst for Steam Reforming of Methane

Ni/Ce x Zr 1- x O 2 /SBA-15 catalysts were prepared and the catalytic activity for steam reforming of methane reaction was investigated. The addition of Ce x Zr 1- x O 2 could obviously enhance catalytic activity of the Ni-based catalyst and Ni/CeO 2 /SBA-15 catalyst shows the excellent catalytic activity and stability at 800 °C over 792 h on steam. After reaction, the mesoporous structure of SBA-15 is still present and the pore walls of SBA-15 prevent the aggregation of nickel. The high catalytic activity and stability of Ni/Ce x Zr 1- x O 2 /SBA-15 catalyst is due to a Ce x Zr 1- x O 2 layer precoated on SBA-15, which plays a role in forming high activity Ni species rather than bulk NiO and giving mobile oxygen species.