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Activation and utilization of CO2 by using catalytic techniques is a significant way to recycle the released CO2. However, the catalysts will tend to be deactivated due to their migration, sintering and agglomeration during the catalytic reactions. Herein, mesoporous Al2O3 was adopt as a catalyst support and mesopore confined Ni-based nanocatalysts were prepared by ultrasonic assisted impregnation method. These catalysts exhibit excellent catalytic activity and stability in CO2 reforming CH4 reaction.