Effect of Calcination Temperature on the Performance of SiO 2 @co@ceo 2 Catalyst in CO 2 Reforming with Ethanol

Catalyst calcination temperature is regarded as one of the vital factors affecting its performance in the heterogeneous catalysis reactions. In this work, the effect of calcination temperature was investigated in detail to design an optimalSiO2@Co@CeO2 catalyst with core–shell structure for CO2 reforming with ethanol reaction. Meanwhile, the structure–activity relationship was also depicted via XRD, TEM, Raman, H2-TPR characterization technique etc. In particular, the catalyst calcined at 550 °C presented the stronger metal-support interaction, the relatively larger specific surface area as well as the smaller grain sizes. Indeed, these structural properties could guarantee the better activity/stability in ethanol dry reforming, due to the enhanced ability to prevent coke deposition and the sintering of active metal. In contrast, the exposure to higher calcination temperature (850 °C) could lead to the aggregation of active species and the weaker Co-Ce interaction, which corresponded to the continuous deactivation.