Trifunctional strategy for the design and synthesis of a Ni-CeO2@SiO2 catalyst with remarkable low-temperature sintering and coking resistance for methane dry reforming

In this study, a trifunctional strategy was developed to prepare confined Ni-based catalyst (Ni-CeO2@SiO2) for dry reforming of methane (DRM) two main greenhouse gases—CO2 and CH4. The Ni-CeO2@SiO2 fabricated by utilizing the confinement effect SiO2 shell synergistic interaction between Ni-Ce decoking CeO2. catalysts were systematically characterized via X-ray diffraction, N2 adsorption/desorption, transmission electron microscopy, energy dispersive spectroscopy, hydrogen temperature reduction desorption set program, oxygen program desorption, Raman thermogravimetric analysis, in situ diffuse reflectance infrared Fourier transform spectroscopy measurements reveal their physicochemical properties reaction mechanism. exhibited higher activity stability than synthesized traditional impregnation method. addition, no carbon deposition detected over after 100 h durability test at 800 °C, average particle size Ni nanoparticles (NPs) increased from 5.01 5.77 nm. Remarkably, also superior low-temperature stability; coke observed when reacted 600 °C 20 h. high coking sintering resistance DRM can be attributed its effect. study could used as guideline design other high-performance CO2 CH4 forming accelerate industrialization.