关键词: 过渡金属硫化物, 催化稳定态, 活性相, MoSxCy, 碳化物, 过渡金属硫化物, 催化稳定态, 活性相, MoSxCy, 碳化物

Abstract: The study on catalytic phases and hydrotreating mechanism of transition metal sulfide (TMS） catalysts used in production of clean fuels has received considerable attention. In this paper，the importance of study on catalytically stable active phases of TMS catalysts is emphasized，and the existence and role of carbon in catalytic stable states are summarized and some novel catalytically stable active phases，such as MoSxCy and CoMoC/NiMoC are presented and discussed. At Last，it is pointed out that the conventional CoMoS may be not a catalytically stable active phase but only a precursor，and that some hydrotreating catalysts such as transition metal carbide and TMS may well possess an uniform MoSC-like active phase stucture under catalytical conditions.

Key words: transition metal sulfide, catalytic stable state, active phase, MoSxCy, carbide, transition metal sulfide, catalytic stable state, active phase, MoSxCy, carbide