Understanding of the effect of synthesis temperature on the crystallization and activity of nano-MoS2 catalyst

Haiping Zhang, Hongfei Lin, Ying Zheng*, Yongfeng Hu, Aimee MacLennan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Temperature is a key factor in the hydrothermal synthesis of MoS2 with high catalytic activity. In this paper, the effect of synthesis temperature (sTemp) and initial temperature (iTemp) was carefully investigated against catalyst crystal structure and hydrotreating activities. The synthesized nano-MoS2 was extensively characterized and evaluated using light cycle oil. There is a minimum sTemp for the formation of crystalline MoS2. Temperatures lower than the minimal sTemp result in amorphous structures. Surpassing this temperature leads to crystallization which goes through different growth routes. Higher iTemp promotes fast nucleation and thus nuclei combination growth. This leads to shorter slabs with a larger degree of defects, and a higher hydrotreating activity. At lower iTemp, crystal tends to grow in a continous way, resulting in fewer defects. In this way, with the increased sTemp, crystallinity is enhanced and slabs are curved and shortened. Both effects lead to improved hydrotreating performances.

Original languageEnglish
Pages (from-to)537-546
Number of pages10
JournalApplied Catalysis B: Environmental
Volume165
DOIs
Publication statusPublished - 1 Apr 2015

Keywords / Materials (for Non-textual outputs)

  • Hydrodesulfurization (HDS)
  • Hydrothermal
  • Initial temperature
  • Light cycle oil
  • Synthesis temperature
  • Unsupported MoS

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