水素化脱硫触媒の表面設計と活性サイト構造

抄録

In order to get deeper insights into Co-MoS₂ hydrodesulfurization (HDS) catalysts, we tried to prepare surface designed Co-Mo HDS catalysts, in which the active sites, CoMoS, are selectively and fully formed, by means of a CVD technique using Co(CO)₃NO as a precursor to Co sulfide. The CVD catalysts were characterized by XPS, XAFS, NO adsorption, and magnetic measurements. Thus CVD-Co/MoS₂ catalysts allow us to study the structure of CoMoS, the reaction mechanism of HDS, and the effects of additives and sulfidation conditions on HDS activity in terms of TOF. The structure of CoMoS is described as dinuclear Co sulfide clusters located on the edge of MoS₂ particles. The electronic state of CoMoS and its TOF are determined by the interaction between MoS₂ particles and the support.