About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Optimal Co-Doping of Ti and Co in CaMnO₃ for Solar Thermochemical Fuel Production |
| Author(s) |
Ting Shen, Jianhua Tong, Dina H. A. Besisa, Yasser M. Z. Ahmed, Rajendra K. Bordia |
| On-Site Speaker (Planned) |
Ting Shen |
| Abstract Scope |
Doped CaMnO₃ perovskites have attracted increasing attention for solar thermochemical fuel (STCF) production due to their lower molecular weight, higher energy storage density, and reduced material costs. In this study, we synthesized a series of Ti/Co co-doped CaMnO₃ (CaCoxTiyMn1-x-yO3) materials with varying Ti content (y=0.05-0.20) to investigate the effects of Ti content on structural and redox properties. Characterizations by XRD, SEM, and EDS revealed that moderate Ti doping maintains phase purity, while higher levels (y ≥ 0.20) result in secondary phases formation. Redox cycling experiments showed that increasing Ti content enhances reducibility and oxygen release with a maximum reduction extent, 0.34. The composition with y = 0.15 exhibited the optimal balance between capacity and stability. These improvements are attributed to the multivalent nature of Ti, which facilitates the formation and diffusion of oxygen vacancy. These findings highlight the potential of Ti/Co-doped CaMnO₃ for efficient STCF applications. |