Journal
ACS CATALYSIS
Volume 1, Issue 5, Pages 537-543Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cs100141p
Keywords
hydrodesulfurization (HDS); MoS2 and WS2 based catalysts; Co doped MoS2/WS2 nanowires; probe aberration corrected STEM
Categories
Funding
- NSF [DMR 0934218]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [934218] Funding Source: National Science Foundation
Ask authors/readers for more resources
In the case of the hydrodesulfurization (HDS) processes one of the best catalysts currently available is that based on MoS2 and. WS2. A very significant increase in their activity can be achieved by adding Co or Ni as a promoter. In the present report we have used probe aberration corrected STEM (scanning transmission electron microscopy) for the first time to characterize Co doped MoS2/WS2 nanowire catalysts (supported on Al2O3 substrates). The high-resolution imaging reveals clearly the location of Co in the individual catalysts. This has not been possible to date with other experimental techniques because of the insufficient image contrast and/or resolution. On the basis of the HAADF-STEM images, we built two models for the Co-Mo-S and Co-W-S catalysts to illustrate the different morphologies found in the catalysts. With this study it is now possible to better locate, identify, and understand the role of promoters in the design and functioning of catalysts.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available