About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Ceramic-Based Materials: Process Development, Materials, Process Optimization and Applications
|
| Presentation Title |
Expanding Laser Powder Bed Fusion to Functional Ceramics: Bulk Mo₂C Cathodes for Catalysis |
| Author(s) |
Fanyue Kong, Keithen Orson, Haobo Wang, Sanjay Choudhary, Petra Reinke, Ji Ma |
| On-Site Speaker (Planned) |
Fanyue Kong |
| Abstract Scope |
Molybdenum carbide (Mo₂C) is a promising and cost-effective alternative to platinum-group metals, such as palladium, for thermal and electrocatalysis, including the hydrogen evolution reaction (HER). However, conventional synthesis via pyrolysis of molybdenum and carbon precursors limits control over surface area, transition metal doping, and microstructure. Laser Powder Bed Fusion (LPBF), an advanced metal additive manufacturing technique, enables rapid solidification and fabrication of complex geometries, offering new opportunities for processing difficult materials. While LPBF has primarily targeted metal alloys, its application to high-melting-point materials such as refractory metals and brittle ceramics like silicon carbide is growing. In this study, we demonstrate LPBF-based fabrication of bulk Mo₂C, addressing challenges associated with its high melting point and intrinsic brittleness. The printed Mo₂C was characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD). XPS confirmed a high-quality carbide surface suitable for catalysis. Electrocatalytic HER performance testing is performed to compare with current state-of-the-art materials. |