Two-dimensional Noble Metal Nanomaterials for Electrocatalysis

Two-dimensional noble metal nanomaterials(2D NMNs) are widely used as electrocatalyst. In recent years, the researchers have focused on the synthesis of 2D NMNs at the atomic scale, and realize the improvement of electrocatalytic performance through further structural modification to reduce the usage of noble metals. Herein, we systematically introduce the synthesis methods of 2D NMNs categorized by element type. Subsequently, the catalytic applications toward a variety of electrocatalytic reactions are described in detail including the hydrogen evolution reaction(HER), oxygen reduction reaction(ORR), oxygen evolution reaction(OER) and CO(2)reduction reaction (CO2RR). Finally, the potential opportunities and remaining challenges in this emerging research area are proposed.