Rational Design of Ru-CeO <sub>2</sub> /Al <sub>2</sub> O <sub>3</sub> Composite Catalysts: Insight into Special Catalytic Behavior in Dimethyl Disulfide Oxidation
The serial Ru/CeO2/Al2O3, CeO2/Ru/Al2O3, and Ru-CeO2/Al2O3 catalysts were successfully prepared for dimethyl disulfide (DMDS) catalytic combustion, in which the deposition sequence of CeO2 and Ru was well regulated. Among these catalysts, the Ru-CeO2/Al2O3 showed the highest activity (T90 = 275 °C), stability and sulfur resistance for DMDS oxidation. It revealed that the simultaneous introduction of CeO2 and RuO2 results in the smallest grain size and highly dispersed CeO2 and RuO2. And the superior performance should be attributed to the excellent low-temperature redox capacity and high concentrations of oxygen defects, which was originated from the strong interaction between Ru species and CeO2. Besides, in situ FTIR and regeneration experiments revealed that the main cause of catalyst sulfur deactivation was sulfur deposition on the catalyst surface, reversible inactivation could be restored by an increase of reaction temperature. This study provides a reference for the rational design and adjustment of catalyst structures.
Authors
- B.H. Chen
- Yichao Ling
- Peng Wang (ORCID: https://orcid.org/0009-0005-1949-2054)
- Lei Li (ORCID: https://orcid.org/0000-0003-3142-4095)
- Jingyue Bi
- Zhaoyang Fei
- Xu Qiao
- Xihua Xu
- Peng Wang
Institutions
- Sinopec (China) (CN)
- Nanjing Tech University (CN)
- Nanjing Institute of Technology (CN)
- Yancheng Institute of Technology (CN)
- State Key Laboratory of Materials-Oriented Chemical Engineering
Publication Details
- Journal
- Industrial & Engineering Chemistry Research
- Published
- 2026-02-16
- DOI
- https://doi.org/10.1021/acs.iecr.5c04383
- Primary Topic
- Catalytic Processes in Materials Science
- Type
- article
- Field-Weighted Citation Impact
- 0.00