Mesoporous Silica Doped with Dysprosium and Modified with Nickel: A Highly Efficient and Heterogeneous Catalyst for the Hydrogenation of Benzene, Ethylbenzene and Xylenes

Cyclohexane based Bis‐imine and Salicylic Acid Derived Tripodal Amide for Optical Recognition and Enrichment of Sm3+ and Dy3+

“…has major application in laser materials, [25,26] as control rod in nuclear reactor, [27] IR radiation source, [28] data storage application, [29] electric car motors, [30] wind turbine generators [31] and terfenol-D. It is used for the synthesis of chromenes, [32] hydrogenation, [33] oxidation of terpenic alcohols, [34] ring opening of meso-epoxide, [35] oxidation of sulfide, thiol, [36] heterogeneous water oxidation, [37] in dosimetry [38] and bone mineral analysis. [39] Both Sm and Dy are used for treatment of cancer.…”

Mesoporous silica gel doped with dysprosium and modified with copper: A selective catalyst for the hydrogenation of 1‐hexyne/1‐hexene mixture

“…45 The combination of doping and modification with rare and transition metals leads to an increase in the selectivity for alkene of synthesized catalysts in the hydrogenation reaction of alkyne/alkene mixture. [46][47][48][49][50][51] In addition, the presence of a dopant in the composite prolongs the life of the catalyst. 52 The aim of the present work was to synthesize catalysts based on mesoporous silica gel modified with copper and mesoporous silica gel doped with dysprosium and modified with copper and to study their selectivity in the hydrogenation reaction of a 1-hexyne/1-hexene mixture.…”

“…Furthermore, some studies showing the effect of the simultaneous presence of REEs and a d‐element in the structure of a material: it was found that the addition of REE increases the dispersion of the metal on the surface of the material, which leads to the formation of a larger number of active centers 45 . The combination of doping and modification with rare and transition metals leads to an increase in the selectivity for alkene of synthesized catalysts in the hydrogenation reaction of alkyne/alkene mixture 46–51 . In addition, the presence of a dopant in the composite prolongs the life of the catalyst 52 …”

Effect of Modification of Amorphous Silica with Ammonium Agents on the Physicochemical Properties and Hydrogenation Activity of Ir/SiO2 Catalysts

“…It has been demonstrated that the support used to disperse an active phase can affect catalyst activity for aromatic hydrocarbons hydrogenation. Several authors have evidenced that the performance of metal catalysts supported on acidic supports for hydrogenation of different organic compounds—e.g., benzene, toluene, and xylene—is enhanced in comparison to catalysts on inert supports, e.g., SiO 2 [ 4 , 5 , 6 , 7 , 8 ] and ordered mesoporous silica [ 9 , 10 , 11 ]. It was found that aromatics adsorbed on acid site can be hydrogenated with the activated hydrogen spillover from metal centers [ 4 , 5 ].…”