The production of 2-MF(2-methylfuran)from the biomass-derived platform molecule furfural by selective hydrodeoxygenation under mild conditions attracts great attention from researchers in recent years.The catalytic performance of different ratios of Ru-doped CoRu/Al2O3 catalysts for the hydrodeoxygenation of furfural to 2-MF was examined.It shows that a small amount of Ru doping can greatly promote the hydrodeoxygenation of furfural,and the proportion of Ru doping has a volcano relationship with the yield of 2-MF.Specifically,when the Co/Ru molar ratio is 50∶1,a high 2-MF yield(68％)is attainable under mild conditions(160℃,1 MPa H2).XRD,TEM,XPS and Py-FTIR characterisation demonstrate that at low Ru loading,Ru is highly dispersed,forming an alloy structure with Co,facilitating electron transfer between Co and Ru to generate CoRuOx species with surface oxygen vacancies.The proportion of the surface oxygen vacancies are affected by the amount of Ru doping,subsequently affecting the distribution of surface acidic sites on the CoRu/Al2O3 catalyst,thus impacting its hydrodeoxygenation performance.
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