Pt nanoparticles supported on porous sheath TiO2 wrapped carbon nanotubes for selective glycerol electro-oxidation into tartronate
Developing high performance catalytic materials for the electro-oxidation of glycerol into specific value-added products is essential for glycerol valorization. Herein, we used the sol–gel method to coat the TiO2 layer with adjustable thickness on the surface of carbon nanotubes (CNTs), obtaining a unique morphology of porous sheath TiO2 wrapped CNTs (TiO2/CNTs). Subsequently, Pt nanoparticles were loaded onto TiO2/CNTs using the ethylene glycol reduction method. The prepared Pt–TiO2/CNTs catalyst achieves a glycerol conversion near 100% at 0.8 V vs. RHE and 60 °C for 10 h. Notably, the selectivity of tartronate reaches 52.5% after 24 h. Characterization results reveal that the dispersed Pt nanoparticles are embedded into the holes of the TiO2 porous sheath, fabricating abundant Pt–TiO2–CNT interface structures. The infusion of TiO2 shifts the center of the d-band upwards, and enhances the adsorption of the glycerate intermediate on Pt particles, which facilitates the further oxidation of glycerate to tartronate. This simple and efficient morphology control method provides a new strategy for glycerol valorization via electrocatalysis.
危险品化学品经营许可证（带存储）