▎ 摘　　要

In view of the rapid increase in energy demands and the depletion of fossil fuel reserves, the exploration of new cleaner energy sources, including fuel cells, is becoming an emergency issue. On the other hand, graphene and related two-dimensional (2D) nanostructures, such as layered transition metal dichalcogenides, owed to their outstanding properties are highly considered as promising candidates for a wide range of energy conversion applications. Recently, metal-based hybrids supported on graphene and related 2D materials have been examined as potential electrocatalysts for the oxygen reduction reaction, a key reaction in fuel cells. The present review article constitutes a detailed map, which embraces all the recent efforts in this rapidly evolving field, and will help researchers to keep up to date, by offering insights into areas where significant improvements could be accomplished. (C) 2017 Elsevier Ltd. All rights reserved.