Exploration on synthesis of activated carbon supported molybdenum carbide, nitride and phosphide via carbothermal reduction route

• Published in: Journal of alloys and compounds 2009-05, Vol.475 (1), p.L38-L41
• Main Author: Yao, Z.W.
• Format: Article
• Language: English
• Subjects: Chemical synthesis; Condensed matter: structure, mechanical and thermal properties; Crystal structure; Exact sciences and technology; Inorganic materials; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Transition metal alloys and compounds; X-ray diffraction
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2008.07.130

A carbothermal reduction route was explored for the preparation of activated carbon supported molybdenum carbide, nitride and phosphide. The resultant samples were characterized by X-ray diffraction technique. The results showed that the MoP can be formed on activated carbon support by carbothermal reduction at 950 °C; the β-Mo 2C can be also synthesized by carbothermal reduction in the presence of a small amount of hydrogen at 950 °C; whereas the γ-Mo 2N cannot be synthesized via carbothermal reduction route. Considering the conditions of preparation, we observed that the difficulty in the preparation of Mo-based compounds by carbothermal reduction route ranked in the order of MoP < β-Mo 2C < γ-Mo 2N. An analysis of formation energy was presumably related to understand the difficulty and feasibility in the preparation of these Mo-based compounds by carbothermal reduction route.