Coupled Co-Doped MoS 2 and CoS 2 as the Dual-Active Site Catalyst for Chemoselective Hydrogenation.

Catalytic hydrogenation plays an important role in the industrial production of fine chemicals. Herein, we report a Co-doped MoS 2 and CoS 2 composite with a coupling interface and successfully apply it for the chemoselective hydrogenation of p -chloronitrobenzene to p -chloroaniline. The target catalyst 0.5CoMoS has ∼100% conversion and ∼100% selectivity. Experiments and theoretical calculations reveal that CoS 2 is more favorable for adsorbing and activating H 2 and provides active hydrogen (H a ) to Co-doped MoS 2 by the coupling interface. By matching the production and consumption rates of H a , the maximization of the reaction yield was achieved. This work may promote the study of MoS 2 -based catalysts for chemoselective hydrogenation.