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As a new material to be used widely in catalytic field, γ-Mo_2N with high specific surface area(usually, S_(BET)>100 m~2·g~(-1) has recently aroused much attention. Its catalytic activities re-semble those of noble metals (Rh, Pd and Pt) in hydrogenation of hydrocarbon. Especially,it has some marvelous characteristics for deep hydrodesulfurization (HDS), hydrodeni-