(513fu) High-Performance Artificial Nitrogen Fixation at Ambient Conditions Using a Boron and Nitrogen Co-Doped Porous Carbon Nanofibers Electrocatalyst
AIChE Annual Meeting
2020 Virtual AIChE Annual Meeting
Catalysis and Reaction Engineering Division
Poster Session: Catalysis and Reaction Engineering (CRE) Division
Friday, November 20, 2020 - 8:00am to 9:00am
NH3 synthesis via the electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions has been regarded as a sustainable strategy for fertilizer production and hydrogen fuel storage and mitigating greenhouse gas emissions. The faradaic efficiency (FE) and reaction rate of the NRR, however, are still low for current electrocatalysts. Herein, we develop a metal-free B, N co-doped porous carbon nanofiber (B/NâCNF) that exhibits superior electrocatalytic performance for the NRR in an alkaline electrolyte with the highest FE of 13.2% at â0.5 V and a NH3 yield rate of 32.5 Î¼g hâ1 mgcat.â1 at â0.7 V. Such a high NRR activity of the B/NâCNF is superior to that of N- or B-doped carbon materials in the literature. The experimental results reveal that the BâN bonds play a critical role in the NRR process, in which N atoms promote the electron conductivity and B atoms efficiently enhance the N2 adsorption and charge transfer.