About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
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| Symposium
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Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
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| Presentation Title |
Shapeshifting and self-regenerating supported metal catalysts for effective CO₂ conversion
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| Author(s) |
Filippo Colombo, Anastasios Tsiotsias, Benjamin Rudolph, Maria Goula, Simone Mascotto |
| On-Site Speaker (Planned) |
Simone Mascotto |
| Abstract Scope |
The shift toward net-zero emissions demands not only new energy technologies but also key materials, making the energy transition inseparable from a material transition. In catalysis, this includes the development of high-performance, sustainable catalysts. Metal exsolution—where metal species segregate from doped oxides under reducing conditions—has emerged as a promising solid-state synthesis method, offering tunable control over nanoparticle size, distribution, and composition.
This work focuses on designing self-regenerating Ni nanoparticles and shapeshifting Fe-Ni bimetallic catalysts for biogas dry reforming and CO₂-mediated ethane dehydrogenation. In situ TEM and synchrotron studies showed Ni nanoparticles exsolved between 500–900 °C, achieving 95% CO₂/CH₄ conversion and excellent regenerability. For Fe-Ni systems, temperature-controlled exsolution produced Fe₃Ni particles at 400 °C and FeOx@Fe₃Ni core–shell structures at 850 °C, enabling reversible shifts in selectivity—from syngas to ethylene—via oxidative cycling. These findings highlight the dynamic potential of exsolved catalysts in advancing efficient and adaptable energy conversion processes |