MIL-Derived Cu3P/FeP Composite as an Electrocatalyst for Oxygen Evolution and Hydrogen Evolution Reaction

초록

Electrochemical water electrolysis has been known as a promising strategy to produce clean and sustainable energy [1]. However, the practical applications of the water splitting have been hindered by the sluggish kinetics of two half-reactions, namely oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) [2]. Herein, copper/iron phosphide nanocomposite materiwal (CuP/FeP) derived from metal-organic frameworks (MOFs) synthesized via subsequent process including hydrothermal, carbonization and phosphidation. The as-prepared composite catalyst displays extremely low overpotentials, significantly low Tafel slope, and superior long-term stability in the 1 M KOH alkaline media. Such outstanding performance could be ascribed to the unique heterostructure, which offers abundant hetero?interfaces between the two phosphide materials, thus enhancing conductivity [3]. This facile fabrication method of heterojunctioned composite can be widely applied to other energy conversion and storage systems such as water electrolysis, batteries, and fuel cells