658
Views
8
Crossref
7
WoS
8
Scopus
1
CSCD
Hydrodesulfurization (HDS) is an essential process in clean fuel oil production, however, the huge challenge is the synthesis of the catalyst with plentiful active sites. Here, we have shown the design of few-layered, ultrashort Ni-Mo-S slabs dispersed on reduced graphene oxide (Ni-Mo-S/rGO-A) based on anchoring [PMo12O40]3− clusters and Ni2+ on polyethyleneimine (PEI)-modified graphite oxide. Structural characterizations (transmission electron microscopy (TEM), X-ray absorption fine structure (XAFS), etc.) show that Ni-Mo-S slabs with predominant monolayer and partial substitution of edge Mo atoms by isolated Ni atoms have rich accessible edge Ni-Mo-S sites and high sulfurization degree. All virtues endow it with plentiful edge-active sites, and consequently, the enhanced performance for hydrodesulfurization of dibenzothiophene (DBT). The hydrodesulfurization proceeds via a more-favorable direct desulfurization (DDS) route with a reaction rate constant (kHDS) of 48.6 × 10−7 mol·g−1·s−1 over Ni-Mo-S/rGO-A catalyst, which is 4.3 times greater than that over traditional Ni-Mo-S/Al2O3 catalyst and at the forefront of reported catalysts.
We gratefully acknowledge the support of this research by the National Key Research and Development Program of China (No. 2018YFE0201704), the National Natural Science Foundation of China (Nos. U20A20250, 91961111, 21901064, and 22171074), the Natural Science Foundation of Heilongjiang Province (No. ZD2021b003), and University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province (No. UNPYSCT-2018013). The project was also supported financially by the Opening Project of Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education.