Abstract
In recent years, much attention has been paid to the development of a new flexible and variable method for molybdenum carbide (Mo2C) synthesis. This work reports the applicability of nano-size clusters of molybdenum blue to molybdenum carbide production by thermal treatment of molybdenum blue xerogels in an inert atmosphere. The method developed made it possible to vary the type (glucose, hydroquinone) and content of the organic reducing agent (molar ratio R/Mo). The effect of these parameters on the phase composition and specific surface area of molybdenum carbides and their catalytic activity was investigated. TEM, UV–VIS spectroscopy, DTA, SEM, XRD, and nitrogen adsorption were performed to characterize nanoparticles and molybdenum carbide. The results showed that, depending on the synthesis conditions, variants of molybdenum carbide can be formed: α-Mo2C, η-MoC, or γ-MoC. The synthesized samples had a high specific surface area (7.1–203.0 m2/g) and meso- and microporosity. The samples also showed high catalytic activity during the dry reforming of methane. The proposed synthesis method is simple and variable and can be successfully used to obtain both Mo2C-based powder and supports catalysts.
Highlights
In recent years, the development of catalysts based on transition metal carbides has become increasingly important in chemical technology
Glucose and hydroquinone were used as reducing molybdenum carbide synthesis
We developed a simple method for obtaining molybdenum carbides using dispersions of molybdenum blue and organic compounds as a carbon source
Summary
The development of catalysts based on transition metal carbides has become increasingly important in chemical technology. Transition metal carbides show high hardness, thermal stability, and catalytic properties similar to Pt group metals [1,2]. One such promising catalyst is molybdenum carbide, Mo2 C. Molybdenum show high selectivity and activity in many reactions, such as isomerization, ammonia synthesis, water–. Gas shift reaction, hydrocarbon reforming, and H2 production [3,4,5,6,7,8,9]. Molybdenum oxides are used as a molybdenum precursor and a mixture of hydrocarbon gases (Cn H2n+2 /H2 )
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