In our research, we have investigated a new series of hydroprocessing catalysts based on our discovery of the activity of the Chevrel phases (1). The family of Chevrel phase compounds has a characteristic structural unit based on the Mo_6S_8 cluster: the general composition is specified as M_xMo_6S_8, where M (the "ternary" metal cation) includes over 40 different metallic elements. Previous methods for preparing Chevrel phases usually have involved solid state syntheses at high temperatures (1000-1300 ℃). The resulting materials have low surface areas, typically around 1 m~2/g.
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