▎ 摘　　要

NOVELTY - Preparing metal single-atom catalyst by hydrothermal method comprises (i) dispersing carbon-based carrier in ultrapure water, sequentially adding metal salt and thiourea solution to obtain precursor solution, and (ii) transferring precursor solution into the reactor, hydrothermally reacting, collecting obtained solid product, washing and drying to obtain the target product. USE - The method is useful for preparing metal single-atom catalyst by hydrothermal method. ADVANTAGE - The method adopts a simple hydrothermal method to prepare the metal single-atom catalyst, avoids the problems of high energy consumption and easy agglomeration caused by high temperature, and can realize the low-cost and large-scale preparation of the metal single-atom catalyst.