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CuO(200)-CuO(1̅11) Interface Enables Efficient Low-Temperature Catalytic Decomposition of CH3SH
Junyu Lai1,2, Yu Feng1,2, Zhizhi Xu3,2
1Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China.
ACS Applied Materials & Interfaces
|June 6, 2026
Summary
A novel inverse Cu-Ce catalyst efficiently degrades methyl mercaptan (CH3SH) at low temperatures. Interfacial engineering enhances catalyst activity and stability for sulfur-containing volatile organic compound (S-VOC) removal.
Area of Science:
- Catalysis
- Materials Science
- Environmental Chemistry
Background:
- Sulfur-containing volatile organic compounds (S-VOCs) pose environmental challenges.
- Low-temperature catalytic degradation of S-VOCs, like methyl mercaptan (CH3SH), is hindered by conventional catalyst limitations.
Purpose of the Study:
- To develop a highly active inverse Cu-Ce catalyst for efficient low-temperature CH3SH degradation.
- To investigate the structure-activity relationship and degradation mechanism.
Main Methods:
- Facet regulation and interfacial engineering to construct CuO/CeO2-CP(7) catalyst.
- Characterization of catalyst structure and active sites.
- In-situ FTIR spectroscopy to elucidate reaction pathways.
- Apparent activation energy determination.
Main Results:
- The CuO/CeO2-CP(7) catalyst achieved complete CH3SH conversion at 150 °C with lower apparent activation energy.
- The catalyst's interface stabilized Cu+ species and enhanced oxygen mobility.
- A stepwise deep-conversion pathway (CH3SH → CH3SSCH3 → CH3SCH3/HCOOH → CH4) was identified.
- Disrupted oxygen cycling was confirmed as the cause of deactivation.
Conclusions:
- CuO-CuO interfacial modulation is crucial for advancing low-temperature S-VOC degradation.
- The designed inverse Cu-Ce catalyst demonstrates superior intrinsic activity and provides a strategy for developing efficient catalysts.
Keywords:
Cu+–O* cooperative sitesCuO(200)–CuO(1̅11) interfaceinverse Cu−Ce catalystlow-temperature catalytic decompositionmethyl mercaptanMore Related Videos
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