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- In relation to this article, we declare that there is no conflict of interest.
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Received February 23, 2023
Accepted October 12, 2023
- This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effects of Pyrolyzing and Phosphiding on Dibenzothiophene Hydrodesulfurization of MOF-Derived Ni 2 P
Abstract
To investigate the potential utilization of MOF templates in hydrodesulfurization (HDS) of large sulfur-containing compounds,
MOF-derived Ni 2 P was prepared and characterized by XRD, TG, SEM, TEM, XPS and Raman. The fi ndings
indicate that MOF-derived Ni 2 P catalyst exhibits signifi cantly enhanced Hydrodesulfurization (HDS) activity compared to
conventional unsupported Ni 2 P. A modifi ed pyrolysis and phosphiding condition allowed the stacking of central Ni atoms to
be aggregated loosely, and morphology of MOF-derived Ni 2 P can be controllably transmitted from polyhedral to petal-like.
A lower pyrolysis temperature tends to reduce density of Ni aggregates and cluster size of Ni 2 P(111), thereby facilitating
the phosphiding of Ni aggregates and enhancing the catalytic activity of MOF-derived Ni 2 P in HDS process. Increasing the
duration time of pyrolysis at lower temperatures does not accelerate the aggregation of particles, but makes petals on surface
of MOF-derived Ni become thinner and eventually disappear, until coral-like nanosphere aggregates with uniform size are
formed. The gradually elimination of MOF framework renders nickel aggregates more susceptible to phosphiding. The collapse
of pore structure of MOF template can impact HDS activity of MOF-derived Ni 2 P. Prolonging pyrolysis time causes
the spacing between Ni 2 P clusters to diminish, thereby signifi cantly decreasing reactivity of Ni 2 P-400-4-275 compared to
Ni 2 P-400-2-275 in DBT–HDS.