Upgrading heterogeneous Ni catalysts with thiol modification

Selective hydrogenation of phenylacetylene over TiO2 supported Ni2P nanoparticles under visible light irradiation

“…A weak peak at 852.0 eV was assigned to Ni 0 , 32 which indicate that the Ni nanoparticles loaded on the TiO 2 surface are highly susceptible to oxidation in air. 33 In contrast, the strong peaks at 852.6 eV were assigned to Ni δ + (0 < δ + < 1) in the Ni 2 P phase of Ni 2 P/TiO 2 . 34 The Ni 2+ peak of Ni 2 P/TiO 2 moved to 856.3 eV, 0.7 eV higher than that of Ni/TiO 2 , which proves that the electrons transfer from Ni to P. The P 2p spectra of Ni 2 P in Fig.…”

“…A weak peak at 852.0 eV was assigned to Ni 0 , 32 which indicate that the Ni nanoparticles loaded on the TiO 2 surface are highly susceptible to oxidation in air. 33 In contrast, the strong peaks at 852.6 eV were assigned to Ni δ+ (0 < δ+ < 1) in the Ni 2 P Light absorption ability is critical for photocatalysts, thus, the UV-vis DRS was further used to examine the light absorptions of the prepared samples. As shown in Fig.…”

Hydrogen Bond Network Induced by Surface Ligands Shifts the Semi-hydrogenation Selectivity over Palladium Catalysts

“…Interfaces play a critical role in tuning the catalytic performance of heterogeneous metal catalysts, including their selectivity. − In this regard, next-generation catalysts with excellent selectivity can be achieved by modifying the chemical properties of interfaces. To date, engineering the surface electronic and atomic structure of nanoparticles has been well-documented as an effective strategy to manipulate the selectivity and activity of catalysts. − An increasing research effort has been focused on exploiting metal–ligand interfaces, which in homogeneous catalysis is vital in determining the overall selectivity of catalysts. − Similarly, organic modification on heterogeneous metal catalysts helps to optimize the catalytic selectivity mainly due to steric, electronic, and ensemble effects. − …”

Silica Modulation of Raney Nickel Catalysts for Selective Hydrogenation

“…For example, commercial Raney nickel catalyst with >85% Ni has been widely used in different hydrogenation reactions, − but the catalytic selectivity is uncontrollable when diverse reaction pathways are involved . To solve this issue, organic compounds with S- or N-containing groups are used to modify the surface of various catalysts, , which can change the adsorption configurations of the reactants to improve the selectivity. However, the leaching of the soluble organics in the reaction system remarkably reduces the catalyst stability.…”