Hydrodesulfurization (HDS) is an essential process in clean fuel oil production, however, the huge challenge synthesis of catalyst with plentiful active sites. Here, we have shown design few-layered, ultrashort Ni-Mo-S slabs dispersed on reduced graphene oxide (Ni-Mo-S/rGO-A) based anchoring [PMo12O40]3− clusters and Ni2+ polyethyleneimine (PEI)-modified graphite oxide. Structural characterizat...

• Advanced IR/CO distinguishes (Co)MoS sites based on promotion degree and edge location. Sulfide are characterized by the IR frequency affinity of adsorbed CO. Absence unpromoted S-edge CoMo catalyst series is revealed. The 3 different CoMoS have intrinsic HDS activity. Partially promoted M- more active than totally sites. Sulfided supported TiO 2 , Al O or SiO was studied CO adsorption follow...