The　design　of　highly　efficient　catalysts　for　CO2　reforming　with　ethanol　is　of　great　interest　due　to　the　serious　coke　deposition　and　the　sintering　of　active　metal.　In　this　work,　sandwich-type　Co　core@shell　catalyst　(SiO2　&　nbsp;@Co@CeO2)　with　Co　nanoparticles　between　SiO2　core　and　CeO2　shell　was　synthesized　by　strong　electrostatic　adsorption　method.　Interestingly,　SiO2　@Co@CeO2　catalyst　exhibited　the　outstanding　activity/stability　toward　CO2　reforming　of　ethanol　in　comparison　with　Co-SiO2　catalyst.　A　bi-functional　mechanism　involving　active　sites　on　CeO2　shell　was　proposed.　Indeed,　cobalt　nanoparticles　between　SiO2　core　and　CeO2　shell　maintained　the　high　dispersion　because　of　the　confinement　effect,　which　supplied　a　stable　Co-ceria　interface　area　where　the　reaction　occurred.　In　addition,　CO(2　&　nbsp;)could　readily　react　with　the　O　vacancies　in　CeO2　shell　to　form　surface　oxygen　species　and　CO,　which　allowed　a　continuous　cleaning　of　coke.　These　positive　factors　could　make　it　as　an　attractive　candidate　for　dry　reforming　process.