Application Of Biomass-derived Carbon Materials For Heterogeneous Catalysis And Energy Storage

As a kind of environmentally friendly materials,biomass-derived carbon materials receive increasingly extensive studies and rapid developments,which could be attributed to their advantages of low cost,renewable,high yield,wide source and high activity.It is of great significance to study biomass-derived carbon materials for the reason that they have been widely used in the field of catalysis and electrochemistry due to their excellent properties in recent years.In this paper,various biomass-derived carbon nanomaterials were prepared with cellulose and chitin as raw materials respectively,applying in the fields of heterogeneous catalysis and supercapacitors.The main results are as follows:?1?Boron,oxygen co-doped carbon material?B-C?was successfully derived from the raw materials of boric acid and cellulose,which exhibited higher catalytic activity in the oxidation coupling reaction of benzylamine.The mechanism of oxidative coupling of benzylamine as well as active centers in B-C were studied by XRD,Raman,TEM,XPS and DFT calculations,determining the synergistic effect of B and O atoms in the catalytic activity site of CBO₂.?2?Non-noble bimetallic alloy catalyst?Co₈Ni₂/NC?was prepared by simple impregnation method with chitin-derived nitrogen-doped carbon material as support.XRD characterization confirmed that the bimetallic alloy formed face-centered cubic phase due to the induction of nickel component.Compared with the pure nickel or cobalt catalyst,the Co₈Ni₂/NC bimetallic catalyst displayed lower activation energy in the hydrodeoxygenation of vanillyl alcohol?rate-determining step?,which proved the synergistic effect of cobalt and nickel contributing to the enhanced catalytic activity.?3?Boron-doped carbon materials with the advantages of high specific surface area(952m² g^-1),suitable porous structure and excellent graphitization degree was developed and applied as electrode material of supercapacitor.The results demonstrated that the doping of boron components not only improved the specific surface area and pore volume of carbon materials,but also faciliated its capacitive performance.B/C assembled supercapacitors showed excellent electrochemical property,receiving the high specific capacitance of 354 F g^-1 at the current density of 0.5 A g^-1 simultaneously with the favorable cycling stability.