Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 46, Pages 26272-26278Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta06076f
Keywords
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Funding
- National Natural Science Foundation of China [51702284, 21878270]
- Zhejiang Provincial Natural Science Foundation of China [LR19B060002]
- Startup Foundation for Hundred-Talent Program of Zhejiang University
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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/N-CNF) that exhibits superior electrocatalytic performance for the NRR in an alkaline electrolyte with the highest FE of 13.2% at -0.5 V and a NH3 yield rate of 32.5 mu g h(-1) mg(cat.)(-1) at -0.7 V. Such a high NRR activity of the B/N-CNF is superior to that of N- or B-doped carbon materials in the literature. The experimental results reveal that the B-N bonds play a critical role in the NRR process, in which N atoms promote the electron conductivity and B atoms efficiently enhance the N-2 adsorption and charge transfer.
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