Achieving high-performance for catalytic epoxidation of styrene with uniform magnetically separable CoFe2O4 nanoparticles

Bimetallic‐organic Frameworks CoMo‐ZIF‐67: An Efficient and Stable Catalyst for Selective Oxidation of Alkenes

“…This is because the excess oxidant will occupy a large amount of active sites, and thus reducing the chance to interact between cyclooctenes and catalysts. Besides, this may also lead to the formation of undesired by‐products [5a,24] . Therefore, 15 mM of TBHP was considered to be the optimal value in this study.…”

“…Moreover, Arrhenius equation can be applied to calculate the apparent activation energy (Ea) [31] …”

Solvothermal synthesis of Co-substituted phosphomolybdate acid encapsulated in the UiO-66 framework for catalytic application in olefin epoxidation

“…As shown in Fig. 7(B), the XPS profiles of Co 2p for PMo11Co present two main peaks centered at around 795.5 and 780.2 eV, which were ascribed to Co II 2p1/2 and Co II 2p3/2, respectively [43][44][45]53,54]. The Co 2p signals of PMo11Co@UiO-66 exhibited a slightly negative shift (795.1 and 779.8 eV) compared to those of PMo11Co, thus providing further evidence that the chemical environments of the Co substituted POM units change to some extent after being introduced 1800 1600 1400 1200 1000 800 600 into the ZrMOFs due to the presence of host-guest interactions.…”

“…Previously, it was reported that the substitution of phosphomolybdic acid by transition metals (TMs) like Ti, V, Co, Nb, and Rh considerably improves the catalytic oxidation ability of the POM catalysts [33,34,[51][52][53][54]. Introducing a small amount of transition metals might adjust the electron density of the neighboring Mo species forming TM-O-Mo bonds, thus activating the olefin epoxidation activity [34].…”

Ligand-free gold nanoclusters confined in mesoporous silica nanoparticles for styrene epoxidation

“…Interestingly, the catalyst was utilized without calcination, which was always required in previously reported catalysts. [35][36][37] Au NCs were successfully synthesized in the pores of MSNs via wet chemical reduction of impregnated gold precursors. For this, amination of MSNs was carried out before introducing an Au precursor to facilitate electrostatic interaction between the MSNs and the added gold precursor ions.…”