Synthesis of Catalytic Precursors Based on Mixed Ni-Al Oxides by Supercritical Antisolvent Co-Precipitation

Mixed Ni-Al oxide catalytic precursors with different elemental ratios (20, 50, and 80 wt.% Ni0) were synthesized using green supercritical antisolvent co-precipitation (SAS). The obtained metal catalysts characterized in detail by X-ray diffraction (XRD) analysis, atomic pair distribution function (PDF) CO adsorption, high-resolution transmission electron microscopy (HRTEM). It was found that the composition structure of are related to Ni content. mixed Ni1−xAlxO NiO-based crystal formed Ni-enriched sample, whereas highly dispersed NiAl2O4 spinel observed Al-enriched sample. tested process anisole H2-free hydrogenation. 2-PrOH used as a hydrogen donor. catalyst 50 Ni0 demonstrated highest activity hydrogenation process.