FeP embedded in N, P dual-doped porous carbon nanosheets: an efficient and durable bifunctional catalyst for oxygen reduction and evolution reactions

Abstract

It is highly desirable but challenging to develop bifunctional electrocatalysts for efficiently boosting both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in energy storage and conversion devices. Here, a simple yet cost-efficient thermal annealing strategy is developed to synthesize FeP embedded in N, P dual-doped 2D porous carbon nanosheets (FeP@NPCs). The obtained FeP@NPCs exhibited outstanding catalytic activities and durabilities toward both the ORR and OER with a potential gap of 0.74 V between the half-wave potential for the ORR and the OER potential at a current density of 10 mA cm⁻² in alkaline electrolytes.