Research Progress of Single Atom Catalysts in Electrochemical Hydrogen Cycling

Single-atom-catalysts(SACs) represents a family of catalysts that contain single metal atom as the catalytic active site,which is widely used in the field of electrochemical catalysis and electric energy conversion equipment due to its advantages high atomic utilization efficiency. In this review,the design rationale and synthetic strategies of SAC catalysts are reviewed. Their implementations in the hydrogen circle,including the electrolysis of water and hydrogen fuel cells,are systematically analyzed,along with the prospected main challenges and the future research of SACs.