Construction of Ti3C2Tx nanoribbons/MoCoPx heterostructures and high-efficient electrocatalytic OER performance
Using HF as the etchant, the Al layer in Ti3 AlC2 is removed to form layered Ti3 C2Tx MXene; with the "shear effect" of KOH, the layered Ti3 C2Tx is transformed into Ti3 C2Tx MXene nanoribbons, which are entangled with each other to form porous The network skeleton is used to promote the exposure of active sites and contact with the electrolyte, and serves as a conductive network for rapid electron transmission. The results show that the MoCoPx synthesized by integrating the hydrothermal process and the phosphating process is firmly loaded with Ti3 C2Tx nanoribbons, forming a stable The lamellar structure provides a porous structure and more active sites, thereby accelerating the ion transport and mass transfer processes; the Ti3C2Tx nanoribbon/MoCoPx heterostructure exhibits excellent OER performance at a current density of 10 mA/cm2 The overpotential is 318 mV (relative to the reversible hydrogen electrode); the Ti3 C2Tx nanoribbon/MoCoPx heterostructure also shows excellent long-term stability. After 2,000 cyclic voltammetry, the current density is 10 mA/cm2. The overpotential is only attenuated by 4 mV, and after 25 hours of long-term stability testing, its current density retention rate is 97.6%; rich components in the heterostructure (Ti3 C2Tx, CoP, CoP2, MoP), unique open pores The network skeleton (nanoribbons entangled to form a sheet-like structure) and stable lamellar structure (strong interaction) contribute to its good electrocatalytic OER performance.