Enhanced ethanol oxidation over Pd nanoparticles supported porous graphene‐doped MXene using polystyrene particles as sacrificial templates
Yizhe Chen, Ming Zhou, Yufu Huang, Yanyun Ma, Luo-Yi Yan, Xin-Wen Zhou, Xinzhou Ma, Xueling Zhao, Cheng Chen, Juan Bai, Donghai Lin
Abstract
Abstract Fabrication of superior catalytic performance palladium‐based catalysts with affordable cost is the key to develop direct ethanol fuel cell. Herein, Pd‐decorated three‐dimensional (3D) porous constructed from graphene oxide (GO) and MXene combining with polystyrene (PS) particles as sacrificial templates (Pd/GO‐MXene‐PS) to elevate the catalytic performance for ethanol oxidation was proposed. The 3D porous interconnected structure of Pd/GO‐MXene‐PS was characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) and Brunner−Emmet−Teller (BET). By optimizing the doping ratio of MXene to GO, the mass activity of Pd/GO 5 ‐MXene 5 ‐PS (2944.0 mA·mg −1 ) was 3.0 times higher than that of commercial Pd/C (950.4 mA·mg −1 ) toward ethanol oxidation in base solution. Meanwhile, the rotating disk electrode (RDE) results demonstrated that Pd/GO 5 ‐MXene 5 ‐PS had a faster kinetics of ethanol oxidation. The enhanced ethanol oxidation over Pd/GO 5 ‐MXene 5 ‐PS could attribute to the excellent 3D interconnected porous structure, large surface area, good conductivity and homogeneous Pd distribution. This work provided a new idea for creating 3D porous MXene composite materials in electrocatalysis.