Oxygen Electroreduction Reaction at Bidimensional Materials

Abstract The electrocatalysis of oxygen reduction reaction (ORR) is of paramount importance in energy-converting systems such as fuel cells and metal–air batteries. Unfortunately, the ORR kinetics is sluggish even at prohibitive platinum group metal (PGM) catalysts. Two-dimensional (2D) materials have attracted increasing interest for energy production and storage in the last years, due to their exceptional chemical, physical, optical and electronic properties. In this review, we briefly report the recent progress of 2D-catalysts for the ORR. Particularly, we approach to heteroatom-doped graphenic materials, dichalcogenides and MXenes offering results that demonstrate outstanding properties of these materials for the construction of competitive ORR electrocatalysts without PGMs.