Boosting electrochemical syngas production with exsolved nanoparticles in solid oxide cells
Solid oxide electrolysis cells (SOECs) are a promising technology for making more efficient use of renewable energy. They can convert surplus electricity from renewable sources such as solar and wind into syngas, a mixture of carbon monoxide and hydrogen that serves as an important feedstock for sustainable fuels and chemicals. However, the performance and long-term stability of SOECs still remain major challenges today.
In his research, Roelf Maring developed perovskite-based electrodes that can make SOECs more efficient, stable, and cost-effective. These electrodes are resistant to high temperatures and can function as both cathode and anode. Through an innovative technique called “redox exsolution,” ultrafine metal nanoparticles were formed directly on the material surface. This significantly improves the catalytic properties while reducing issues such as degradation and carbon deposition.
The results show that these modified electrodes enhance syngas production while requiring less energy. In addition, Maring demonstrated that ethanol, used as an alternative fuel source, can further improve the energy efficiency of the system. Under certain operating conditions, the cells were even able to simultaneously produce syngas and generate electricity.
This dissertation highlights the potential of advanced materials engineering and nanotechnology for sustainable energy storage and green chemical production. The findings may contribute to the development of more efficient and affordable technologies for a climate-neutral future.