Elucidating the promoting mechanism of coordination-driven self-assembly MOFs/SiO2 composite derived catalyst for dry reforming of methane with CO2

A mesoporous SiO2 (termed as mSiO(2)) confined Ni-MgO solid-solution catalyst (termed as Ni-MgO@mSiO(2)(MOF)) with high specific surface area (704.9 m(2).g(-1)) has been synthesized derived from the MOFs/mSiO(2) composite towards the in-situ generated Ni-Mg bimetallic MOFs cross-linked mSiO(2) gel with chemical interaction for the first time. The developed Ni-MgO@mSiO(2)(MOF) exhibits remarkable catalytic activity (nearly reaching thermodynamic equilibrium), stability as well as coke-resistance (1.25 mg.g(cat)(-1).h(-1)) compared with those of classic NiMgO/mSiO(2)(NO3) catalyst (7.47 mg.g(cat)(-1).h(-1)) without using MOFs-templated strategy. The enhanced performance of Ni-MgO@mSiO(2)(MOF) catalyst for DRM was attributed to that more highly dispersed metallic Ni, stronger Ni-MgOmSiO(2) interaction, as well as more surface OH* species in comparison with those of classic Ni-MgO/mSiO(2)(NO3). We anticipate that design strategy will provide a novel alternative to expand opportunities to explore scalable and cost-effective non-noble metal catalysts on a molecular level for other industrial reactions.