Metal-organic framework-derived Co-C catalyst for the selective hydrogenation of cinnamaldehyde to cinnamic alcohol

Schiff Base Functionalized Cellulose: Towards Strong Support-Cobalt Nanoparticles Interactions for High Catalytic Performances

“…Subsequently, cobalt ions were complexed with the salen-type ligand, and the resulting complex was reduced to cobalt nanoparticles, which are stabilized by interactions with surface salen-type groups. only Co-based catalysts exhibit a higher tendency to C=O hydrogenation at the expense of somehow moderate activity [55].…”

“…Using this procedure and taking into account the acidity of unoxidized bleached cellulose pulp, the content of the aldehyde group in DAC was measured to be 2.08 ± 0.1 mmol/g. only Co-based catalysts exhibit a higher tendency to C=O hydrogenation at the expense of somehow moderate activity [55].…”

“…Selective hydrogenation of cinnamaldehyde (CAL) serves as an important and representative model reaction, as both the carbonyl group (C=O) and the carbon-carbon double bond (C=C) of the molecule can be involved in the hydrogenation. However, from a thermodynamic perspective, the hydrogenation of the C=C group of the enone is more favorable than that of the C=O because C=C bond energy (615 kJ/mol) is lower than C=O (715 kJ/mol) [55]. Additionally, the conjugated structure causes the simultaneous hydrogenation of the C=O and C=C groups, often resulting in a mixture of three hydrogenated products; cinnamyl alcohol (COL), hydrocinnamaldehyde (HCAL), and hydrocinamyl alcohol (HCOL) [56,57].…”

“…CoNP catalysts have been reported to favor the adsorption of the C=O group and have shown a high selectivity in the α, β-unsaturated aldehyde hydrogenation [59,60]. More importantly, according to Tian et al, among non-noble metals such as Ni, Cu, and Co, only Co-based catalysts exhibit a higher tendency to C=O hydrogenation at the expense of somehow moderate activity [55].…”