Heterogeneous Silica Tethered Ruthenium Catalysts for Carbon Sequestration Reaction

Hydrotalcite Anchored Ruthenium Catalyst for CO2 Hydrogenation Reaction

We developed a series of new organic-inorganic hybrid hydrotalcite functionalized Ru catalytic systems. All the developed materials have been studied by FTIR, N2 physisorption, ICP-OES, XPS, NMR (1H, 13C, 29Si) and TEM analysis were performed to know the physiochemical behavior and structural morphology of functionalized hydrotalcite materials. XPS results strongly suggest that it involves the formation of N-Ru coordination bonds. We applied these well analyzed materials for CO2 hydrogenation reaction as catalyst (with and without ionic liquid medium). We found that Ru metal containing functionalized hydrotalcite materials were highly active and stable (in terms of catalyst leaching and recycling). The heterogeneous catalyst can be easily recovered and reused 8 times without significant loss of catalytic activity and selectivity, which is a better green alternative for practical applications.