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Published on: April 27, 2018
Synergistic Interactions of Neighboring Platinum and Iron Atoms Enhance Reverse Water-Gas Shift Reaction Performance
Huilin Wang1,2, Megalamane S Bootharaju3,4, Jeong Hyun Kim3,4
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
A novel hetero-dual-site catalyst featuring iron (Fe) and platinum (Pt) on cerium dioxide (CeO2) significantly enhances the reverse water-gas shift reaction for efficient CO2 conversion. This advanced catalyst demonstrates high performance and stability for fuel production.
Area of Science:
- Heterogeneous Catalysis
- Materials Science
- Chemical Engineering
Background:
- Conventional reverse water-gas shift (RWGS) catalysts face limitations in controlling composition and structure.
- Upgrading RWGS catalysts is crucial for efficient fuel production from CO2.
Purpose of the Study:
- To design and synthesize a novel hetero-dual-site catalyst for improved RWGS performance.
- To investigate the promotional effects of Fe on Pt catalysts for CO2 to CO conversion.
Main Methods:
- Synthesis of Fe-Pt/CeO2 catalyst by controllably loading Fe atoms adjacent to Pt atoms on CeO2.
- Characterization of catalytic performance for CO2 to CO conversion.
- Experimental and computational investigations to elucidate the catalytic mechanism.
Main Results:
- The Fe-Pt/CeO2 catalyst achieved a high turnover frequency (TOF_Pt: 43,519 h-1) for CO2 conversion.
- The catalyst exhibited ~100% CO selectivity at 350 °C.
- Over 80% of the initial activity was retained after 200 hours of continuous operation.
Conclusions:
- A 'two-way synergistic effect' between Fe and Pt enhances catalytic activity and stability.
- Fe atoms act as promoters and are activated by Pt-generated hydrogen species.
- The developed catalyst shows significant promise for enhanced fuel production via RWGS.
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