“…Therefore, the HDO pathway is preferred in the DX process for the conversion of biomass into long-chain hydrocarbons as a clean fuel. [4][5][6][12][13][14][15][16] Generally, heterogeneous catalysts such as transition-metal sulfides (TMSs), noble metals, and metal oxides (MOs) are usually used as catalysts in the DX reaction of bio-oils because of their excellent activities. 5,6,[17][18][19][20][21][22] However, they have a high cost, are poisonous and corrosive, and have negative effects on industrial processes, the environment, and human health.…”