Nitrogen, phosphorus co-doped carbon dots/CoS2 hybrid for enhanced electrocatalytic hydrogen evolution reaction

Developing highly efficient and low cost hydrogen evolution reaction (HER) electrocatalysts is still a huge challenge. In this study, we demonstrate a facile method to fabricate a nitrogen, phosphorus co-doped carbon dots/CoS2 (NPCDs/CoS2) hybrid as an electrocatalyst for HER with desirable electrocatalytic activities (low overpotential ∼78 mV and small Tafel slope ∼76 mV dec−1) and long-term stability (after 1000 CV cycles with negligible current loss ∼1 mA cm−2) in acidic media.