Ni-promoted MoS₂ in hollow zeolite nanoreactors: enhanced catalytic activity and stability for deep hydrodesulfurization

Abstract

Improving the intrinsic catalytic activity of the active phases and mass transfer of the reactants and products are key issues in heterogeneous catalysis. Herein, we construct hollow zeolites with a...

Highly efficient hydrodesulfurization driven by an in-situ reconstruction of ammonium/amine intercalated MoS2 catalysts

“…Furthermore, the stability of MoS 2 -OA was evaluated as another important indicator for practical application since it had already exhibited outstanding activity as mentioned above. 60 MoS 2 -OA was reused in the HDS of DBT for six cycles continuously, and the results are summarized in Figure 6 A, which indicates the good stability of MoS 2 -OA during DBT HDS. In addition, the MoS 2 -OA catalyst could still show outstanding HDS efficiency in treating the highly refractory organosulfur compound 4,6-DMDBT ( Figure 6 B).…”

Insight into the Catalytic Oxidation Mechanism of Hydrogen Isotopes by Pt Clusters Confined by Silicalite-1

“…Zeolites, with their ordered microporous structure and outstanding stability, have attracted much attention in the fields of adsorption and catalysis. − To achieve long-term stability and high catalytic efficiency, a type of ligand-stabilized in situ encapsulation method for zeolite-confined metal catalysts was recently proposed. , The confining effect of the rigid framework and enhanced metal–support interaction inhibit the metal species inside zeolite migrating during catalytic cycles. − Additionally, direct hydrogen reduction to remove organic templates and ligands can effectively prevent metal nanoclusters from reuniting during the conventional calcination–reduction process. − Sun et al employed a ligand-protected direct hydrogen reduction method to synthesize MFI zeolite–encapsulated single Rh atoms. The catalyst reduced at 500 °C exhibited remarkable efficiency in nitroarene hydrogenation .…”

An environment-friendly and acid-degradable polymer templated synthesis of single-crystal hierarchical zeolites

“…[1][2][3][4][5][6][7][8][9] Hierarchical pore architecture in zeolites can reduce the diffusion limitations for converting bulky molecules, enhance the mass transfer of reactants and products, and increase the accessibility of active sites, and therefore endows hierarchical zeolites with dramatically enhanced activity, selectivity and stability. [10][11][12][13][14][15][16] To date, various strategies have been developed for creating meso-/macro-pores in microporous zeolites, including destructive top-down approaches via dealumination and/or desilication, [17][18][19] constructive bottom-up ones by using multifunctional hard 20 /so [21][22][23][24][25][26][27][28][29] macro-/meso-porogens, and seed-directed methods. 15 Among them, so template directed synthesis exhibits great advantage for rationally tuning mesopore architecture.…”