Multifunctional Gallium Stabilized Atomically Dispersed Cobalt Bimetallic Catalyst for Efficient Hydroformylation Reaction

Developing highly active non-precious metal catalysts is crucial to the hydroformylation reaction. Herein, a series of Co-Ga bimetallic catalysts has been constructed, which showed high catalytic efficiency for hydroformylation of olefins (TOF > 224.6 h −1 ) while maintaining consistent catalytic activity over 8 catalytic cycles. The multifunctional role of Ga component significantly enhances the catalyst’s activity in the hydroformylation reaction. First, Co species were atomically dispersed in 0.6CoGa/SiO 2 catalyst with the help of the Ga component. In addition, Ga 2 O 3 on the surface had the effect of stabilizing Co δ+ species, and the Ga sites acted as the second catalytic site activating H 2 . In situ XPS, in situ FT-IR, and DFT calculations jointly demonstrated that Co and Ga synergistically improved the adsorption and activation of olefins, H 2 and CO, which promoted the hydroformylation reaction.