A group of silica-ionic liquid supported Ru-based catalysts was synthesized and further utilized
for CO2 hydrogenation reaction. All the materials were properly analyzed in terms of their physicochemical
properties. The physiochemical impacts of different functionalized and non-functionalized
ionic liquid over the synthesis, size, and stability of Ru NPs along with their effect on the rate of hydrogenation
reaction were investigated. The Ru-[DAMI][NTf2] (1:10)@SiO2 furnished the best catalytic
performance in CO2 conversion to formic acid under high-pressure reaction condition. The results
confirmed the impact of ionic liquids as a repellent to avoid agglomeration and oxidation of the Ru nanoparticles
followed by space resistance and electrostatic protection. Hence, such influence positively
begins the rate of reaction as well as the selectivity of the process. Good physiochemical stability of
catalyst in terms of 7-time catalyst recycling and easy product/catalyst isolation make this protocol
near to the principal of sustainable chemistry.
Keywords: Silica-ionic liquid supported Ru metal, nanoparticles, ionic liquid, hydrogenation reaction, formic acid.
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