77 / 2019-10-29 13:01:30

PREPARATION OF GRAPHITIC POROUS CARBON FROM SALIX AND THEIR APPLICATIONS IN ELECTROCATALYTIC OXYGEN REDUCTION

Graphitic carbon,biomass,electro-catalytic oxidation

Graphitic carbon material, due to their excellent physical chemistry stability show great potential for carbon capture and energy storage. However, their high-cost preparation, low yield and poor synthesis conditions hindered them in the actual application. Consequently, preparation of the graphitic carbon material has been aroused great attentions from low-cost and renewable source by an environment friendly and efficient process.
One potentially environment friendly method is render biomass as carbon source for use as graphitic carbon. In this article, we used forestry biomass Salix as feedstock to prepare graphitic carbon material, which hydrothermal carbonization was used in combination with graphitization. The results showed that the graphitization degree and BET specific surface area of carbon are close related to HTC reaction time. Graphitization degree increase with the reaction time increase, and the N2 adsorption/desorption isotherms analysis showed that BET specific surface area of graphitic carbon increased gradually with extension of the HTC reaction time. The morphology of graphitic carbon derived from hydrochar was transformed into coil morphology from nanowires when the reaction time was extended from 4 h to 26 h. Electrochemical study showed that graphitic carbon has been modified as electrodes to increase electrode’s reversibility. Herein, graphite carbons loaded Pt nanoparticles can be acted as electrodes, they showed highest electrochemical active area and reversibility, which higher electrocatalytic activity for the oxidation of methanol than that of commercial Pt / C（20%）.