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Electrocatalytic NO reduction is a promising technology for ambient NO removal with simultaneous production of highly value-added NH. Herein, we report that honeycomb carbon nanofiber coated on carbon paper acts as an efficient metal-free catalyst for ambient electroreduction of NO to NH. In 0.2 M NaSO solution, such catalyst achieves an NH yield of 22.35 μmol h cm with a high Faradaic efficiency of up to 88.33%. Impressively, it also shows excellent stability for 10-h continuous electrolysis. Theoretical calculations reveal that the most active center of functional groups is -OH group for NO reduction with a low energy barrier (ΔG of 0.29 eV) for the potential-determining step (*NO + H → *HNO).
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| http://dx.doi.org/10.1016/j.jcis.2022.02.074 | DOI Listing |
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