Abstract
AbstractThe electrocatalytic N2 reduction reaction (NRR) provides an environmentally benign approach for NH3 production that can be powered by renewable energy. It remains a challenge to understand the NRR mechanism and develop highly chemically active and selective yet low‐cost electrocatalysts. Herein, we report that N, P co‐doped porous carbon (NPC) with trace Fe (0.028 wt%) (Fe‐NPC) can serve as an electrocatalyst for the NRR in NaOH aqueous solution under ambient conditions. The Fe‐NPC catalyst exhibits significantly enhanced NRR activity compared with NPC, owing to the N, P co‐doped effect and trace Fe species active sites in the carbon material. The highest faradaic efficiency and ammonia yield of Fe‐NPC at −0.1 V vs. RHE reached 5.3 % and 4.36 μg h−1 mg−1cat. Furthermore, the electrochemical reaction mechanism on the Fe‐NPC electrode was investigated by electrochemical in situ Fourier transform infrared spectroscopy, and suggested an associative pathway.
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