Low Temperature CO 2 Reforming with Methane Reaction over CeO 2 -Modified Ni@SiO 2 Catalysts

Developing high performance catalysts for the low temperature CO 2 reforming with methane (CRM) reaction is a challenge due to the occurrences of metal sintering and carbon deposition. In this study, we synthesized CeO 2 modified Ni@SiO 2 catalysts with excellent properties of sintering-resistance and low carbon deposition for high performance low temperature CRM. The Ni@SiO 2 -CeO 2 catalysts displayed a size effect from tiny Ni nanoparticles to enhance CRM performance and a confinement effect from silica encapsulation to limit Ni sintering and exhibited oxygen storage capacity from ceria to reduce carbon deposition. Performance and characterization results revealed that the Ni@SiO 2 -CeO 2 -W catalyst with smaller ceria size exhibited higher performance and lower carbon deposition than the Ni@SiO 2 -CeO 2 –E catalyst with bigger ceria size, because the smaller ceria nanoparticles activated more CO 2 . This work provided a simple strategy to deposit small sized ceria on the Ni@SiO 2 catalyst surface for the performance enhancement of low temperature CRM.