Abstract
Reasonable design of electrocatalyst based on abundant earth elements is of great importance for sustainable energy use. Transition metal nitrogen doped carbon (TM-N/C) materials demonstrate excellent catalytic activity. However, there is still a lack of comprehensive understanding of these TM-N/C-systems. Herein, we have developed an effective approach to develop highly active and stable Cu promoted N-doped carbon (Cu-N/C) catalysts. The impacts of copper doping and temperature of pyrolysis on catalytic performance have been studied. The Cu-NC-800 catalysts exhibited excellent catalytic activity and stability with an onset potential (Eo) of 0.99 V and half-wave potential (E1/2) of 0.85 V. It also shows strong the long-term stability. The synergistic effect between Cu (II)-N ligand and Cu0 nanoparticles is high, the active center is small, the transfer of mass is rapid, and the electrocatalytic efficiency is increased. The findings showed that the non-noble metal-based catalyst’s bifunctional oxygen electrode activities prepared in this study were as high as those of commercial oxygen-based, noble metal catalysts.
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