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Constructing Dynamic Rhδ+-Ov-Ti Interfacial Sites for Highly Efficient and Stable Photothermal Catalytic Methane Dry
Hailong Xiong1,2,3, Zehui Dai3, Cenfeng Fu4
1Anhui Engineering Research Center of Carbon Neutrality, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, China.
This study introduces a novel Rh-embedded SrTiO3 catalyst for photothermal dry reforming of methane (DRM). The catalyst exhibits enhanced efficiency and stability, overcoming coking issues in greenhouse gas conversion.
Area of Science:
- Materials Science
- Catalysis
- Renewable Energy
Background:
- Photothermal catalytic dry reforming of methane (DRM) converts greenhouse gases into syngas.
- Current DRM processes face challenges with low reactivity and instability due to coking.
Purpose of the Study:
- To develop a highly efficient and stable catalyst for photothermal DRM.
- To investigate the mechanism of enhanced catalytic activity and stability.
Main Methods:
- Synthesis of Rh-embedded SrTiO3 catalyst.
- In situ characterizations (e.g., spectroscopy) and theoretical calculations.
- Testing catalyst performance in photothermal DRM under light irradiation.
Main Results:
- Stable interfacial sites (Rhδ+-Ov-Ti) were formed via strong electronic metal-support interactions.
- These sites facilitate methane and CO2 activation through a coking-free CH3O* pathway.
- Achieved high syngas yield (7.6/9.6 mol gRh-1 h-1 for H2/CO) and 100-hour durability.
Conclusions:
- The Rh-embedded SrTiO3 catalyst offers a promising solution for efficient and stable photothermal DRM.
- The interfacial site engineering strategy is applicable to designing other anticoking catalysts for various reactions.
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