A highly sulfur resistant and stable heterogeneous catalyst for liquid-phase hydrogenation

Pd/N, S co-doped activated carbon as a highly-efficient catalyst for the one-pot synthesis of meropenem

“…By strengthening the potent support–metal active center interaction and reducing the electron density in the loaded metal, the strong adverse effect of sulfur on the metal center can be weakened. 54,55 This suggests that the decreased surface palladium atom electron density induced decreased metal–sulfur bonding as well as enhanced the sulfur resistance. Therefore, Pd δ + species are more sulfur-resistant than Pd 0 in Pd catalysts.…”

Recent Advances on Heterogeneous Non-noble Metal Catalysts toward Selective Hydrogenation Reactions

“…This indicates that metallic Co NPs preferentially adsorb −NO 2 , while the CoO x species has a strong adsorption capacity for the −CC bond. In addition, Ni-based catalysts have also shown significant selectivity in the hydrogenation of nitrobenzene. ,− For example, Corma et al reported the preparation of the Ni/TiO 2 catalyst, in which Ni NPs are modified by the TiO x layer with tunable crystal dimension and exposed domains of metal . This catalyst shows a high selectivity toward 3-vinylaniline (90.2%) in the hydrogenation of 3-nitrostyrene, which is superior to the unmodified nickel catalyst (55.3%).…”

Subsurface Ru-Triggered Hydrogenation Capability of TiO2–x Overlayer for Poison-Resistant Reduction of N-Heteroarenes

“…Beller et al have developed low-dimensional graphene-encapsulated Co NPs showing remarkable performances in the reduction of N-heterocycle compounds . Catalysts with similar structures have also shown strong poisoning resistance in nitroaromatic hydrogenation and electrocatalytic reactions. − Structural and theoretical studies revealed that the interaction of the π orbitals of the graphene layer and the d-band of the encapsulated metal core is the key factor that enables the graphene layers to be active for hydrogenation reactions . With the modification of encapsulated metal particles, the “metallic” graphene shell formed the appropriate p-band structure that activates the reactants and regulates the conversion pathways. , Additionally, the inorganic shell also constructs a physical isolation shell preventing the poisoning or damage of the metal core .…”

“…18−20 Structural and theoretical studies revealed that the interaction of the π orbitals of the graphene layer and the dband of the encapsulated metal core is the key factor that enables the graphene layers to be active for hydrogenation reactions. 19 With the modification of encapsulated metal particles, the "metallic" graphene shell formed the appropriate p-band structure that activates the reactants and regulates the conversion pathways. 19,20 Additionally, the inorganic shell also constructs a physical isolation shell preventing the poisoning or damage of the metal core.…”

“…19 With the modification of encapsulated metal particles, the "metallic" graphene shell formed the appropriate p-band structure that activates the reactants and regulates the conversion pathways. 19,20 Additionally, the inorganic shell also constructs a physical isolation shell preventing the poisoning or damage of the metal core. 21 Transition metal oxides are another group of nonmetal material, which are commonly used as catalyst supports.…”