A novel catalyst for gas phase hydrodechlorination of chlorobenzene: Silica supported Ni3P

The silica supported nickel and Ni3P catalysts were used for the gas phase catalytic hydrodechlorinaton of chlorobenzene, and their properties were characterized by means of H2 temperature programmed reduction (H2-TPR), N2 adsorption, X-ray diffraction (XRD), H2 temperature programmed desorption (H2-TPD) and X-ray photoelectron spectroscopy (XPS). Compared with the nickel catalyst, the Ni3P catalyst showed remarkably better catalytic performance for the hydrodechlorinaton of chlorobenzene, which was mainly attributed to more spilt-over hydrogen species on its surface. The spilt-over hydrogen species was responsible for promoting the dissociation of C–Cl bonds.