The presence of rare earth oxides could promote reduction of nickel species in nickel-magnesia solid solution, especially CeO2. Therefore, NLM and NCM both showed higher activity and selectivity than the Ni/MgO catalyst NM.

• 所得催化剂NLM、NCM具有较大比表面和较小镍晶粒度，以NCM中镍物种的还原性能改善尤为明显。