Geometrical confinement effect in the liquid-phase semihydrogenation of phenylacetylene over mesostructured silica supported Pd catalysts

Textural properties of nickel, palladium and titanium oxides supported on MCM-41 materials and their application on oxidative desulfurization of dibenzothiophene

“…It is noteworthy that even with the incorporation of NiO, PdO or TiO 2 particles, the MCM-41 still maintains a good structural order in all samples analyzed. Previous work 20,21 also showed that the formation of particles did not affect the structure of highly ordered mesoporous host materials consistent with the results of XRD (see Figure 1).…”

“…TEM images (Figures 4b to 4d) show that most of the NiO, PdO, and TiO 2 of the prepared catalyst are small particles and were well distributed inside the pores of the MCM-41, which also was observed in other studies [19][20][21] .…”

A core–shell structured Si–Al@Al2O3 as novel support of Pd catalyst

“…This result confirms that better mass transfer on core-shell structured Pd/Si-Al@ Al 2 O 3 greatly enhances the styrene selectivity. This result is consistent to other alternatives such as adopting MCM-41 with larger pores as support [3]. Furthermore, as for hydrogenation of 1,5-COD, the selectivity difference between Pd/Si-Al@Al 2 O 3 and Pd/Al 2 O 3 is not obvious.…”

“…To improve the activity and selectivity of heterogeneous catalyst for consecutive hydrogenation, various mass transfer intensifying alternatives have been investigated, such as the monolithic catalyst design [1,2], macroporous support [3] and core-shell type catalyst [4] based on ceramic supports.…”

Pd nano-particles (NPs) confined in titanate nanotubes (TNTs) for hydrogenation of cinnamaldehyde

“…Confining metal nanoparticles (NPs) within the space of nano-scale, such as micro [8]/meso-pores [9,10], tubular cavity [11] or micro cages [12], could modify the physico-chemical properties of entrapped metal NPs due to quantum effect and size effect. Recently, the work of Bao and Li's group has revealed that metal components (i.e., Fe, Ru, Pt) incorporated into carbon nanotubes can remarkably enhance catalytic activity towards Fischer-Tropsch synthesis [13], oxygen reduction [14], and hydrogenation [15].…”