Stability of MoS Nanocatalysts for the Slurry-Phase Catalytic Hydrogenation of Anthracene.

The stability of both the structure and activity of MoS nanocatalysts is crucial for minimizing the catalyst cost of the slurry-phase (SP) catalytic hydrogenation. MoS-GP and MoS-SP catalysts were, respectively, obtained by gas-phase (denoted as GP) and SP aging of fresh MoS catalysts. The MoS-SP catalyst demonstrated a comparable catalytic hydrogenation activity to that of the fresh MoS catalyst, which is about 1.7 times of that for the MoS-GP catalyst. After 12 cycles of the MoS-SP catalyst, the obtained Cy12 catalyst demonstrates a retention of 92.0% of its initial catalytic activity. The MoS-SP catalyst exhibits an impressive stability of catalytic hydrogenation. The MoS-SP catalyst exhibits average stacking layers of 3.3 and an average slab of 5.2 nm and exposes 14.0% of active sites. The MoS-SP catalyst can serve as a highly active and stable catalyst for catalytic hydrogenation. This finding can offer valuable insights into the stability of the hydrogenation catalyst in SP hydrogenation technology.