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CATALYSIS COMMUNICATIONS · 2016 · IF 3.389

Bulk and Al2O3-supported Ni2P HDS catalysts prepared by separating the nickel and hypophosphite sources

Dapeng Liu,Anjie Wang,Chenguang Liu,Roel Prins

Bulk Ni 2 P and Al 2 O 3 -supported Ni 2 P were prepared at low phosphidation temperature (300 °C) from Ni 9 S 8 and NH 4 H 2 PO 2 , which were separated to avoid the formation of phosphate inside the support pores. The unsupported product phases were characterized by XRD and the Ni 2 P/Al 2 O 3 catalysts by XRD, BET and TEM. A 10 wt.% Ni 2 P/Al 2 O 3 catalyst, made by the Ni(NO 3 ) 2 –NiO–Ni 9 S 8 –Ni 2 P path at a P/Ni ratio of 3, showed the highest activity in the hydrodesulfurization of dibenzothiophene. By separating the nickel and hypophosphite sources, Ni 2 P/Al 2 O 3 catalysts could be obtained at low phosphidation temperature and with low degree of blockage of pores by surplus phosphorus.

研究领域: 催化化学 · 材料科学

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LANGMUIR · 2019 · IF 3.683

Soft-Chemical Method for Synthesizing Intermetallic Antimonide Nanocrystals from Ternary Chalcogenide

Yilan Jiang,Long Yuan,Yanyan Xu,Jiaojiao Ma,Yu Sun,Xia Gao,Keke Huang,Shouhua Feng

The synthesis of intermetallic antimonides usually depends on either the high-temperature alloying technique from high-purity metals or the flux method in highly poisonous Pb-melt. In this paper, we introduced a soft-chemical method to synthesize intermetallic antimonides from ternary chalcogenide precursors under an argon atmosphere below 200 °C. Powder X-ray diffraction and compositional analysis clearly indicate that a new phase of the Ag3Sb nanocrystal was synthesized from the Ag3SbS3 precursors. Three types of trialkylphosphines (TAPs) were applied as desulfurization agents, and the transformation mechanism was elucidated. The capability of the desulfurization agent follows the sequence of triphenylphosphine (TPP) > tributylphosphine (TBP) > trioctylphosphine (TOP). Besides, this TAP-driven desulfurization route to synthesize the intermetallic phase could also be possible for AgSbSe2 and Sb2S3. Therefore, this paper provides an efficient and mild technique for the fabrication of intermetallic nanocrystals.

CAS / MDL: 112-90-3 7704-34-9 7782-49-2 126-73-8 603-35-0

研究领域: 材料科学 · 纳米技术

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Bulk and Al2O3-supported Ni2P HDS catalysts prepared by separating the nickel and hypophosphite sources

Soft-Chemical Method for Synthesizing Intermetallic Antimonide Nanocrystals from Ternary Chalcogenide