Hydrophobic Poly(divinylbenzene) Polymer‐Supported Ruthenium Catalysts for Efficient Hydrogenation of Pyridines in Water

) is about 6.0 and 768.0-fold higher than those of traditional Ru/C and commercial Raney Ni catalysts under equivalent reaction conditions. Mechanistic studies reveal that the hydrophobic polymer prevents filling of water in the nanopores of PDVB, allowing hydrogen enrichment to boost the hydrogenation. This work provides an opportunity to improve the efficiency of industrially important reactions that suffer from poor gas solubility and mass transfer.