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  • Title: Defective S/N co-doped carbon cloth via a one-step process for effective electroreduction of nitrogen to ammonia.
    Author: Cheng S, Li C, Yu Z, Sun Y, Li L, Yang J.
    Journal: RSC Adv; 2020 Mar 06; 10(17):9814-9823. PubMed ID: 35498575.
    Abstract:
    The electroreduction of nitrogen (N2) has gained increasing attention as a promising route to achieve green and sustainable ammonia (NH3) production. However, the construction of an active and durable electrocatalyst for N2 reduction reaction (NRR) remains a significant challenge. Herein, we, for the first time, report that S/N co-doped carbon cloth (CC) with abundant defects can serve as an efficient NRR electrocatalyst at ambient conditions. The S/N co-doped CC was prepared through a novel one-step method by using ammonium persulfate (APS) as the source of nitrogen and sulfur. The catalyst prepared at 800 °C (CC-APS 800) showed abundant defects and heteroatoms as the active and stable electrocatalytic sites for NH3 electrosynthesis. Based on this, a sizeable NH3 yield of 9.87 × 10-10 mol s-1 cm-2 and high faradaic efficiency of 8.11% were obtained in 0.05 M H2SO4 at -0.3 V (vs. reversible hydrogen electrode, RHE), respectively. Furthermore, the electrocatalytic mechanism on CC-APS 800 was elucidated using the electrochemical in situ Fourier transform infrared technique, and follows an associative reaction pathway. Our work would provide a new guideline for designing metal-free self-standing electrocatalysts for the NRR and other applications.
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