▎ 摘　　要

Developing high-efficiency nonmetal electrocatalysts for the electrochemical N-2 reduction reaction (NRR) is of great significance for the sustainable development of human society. Here, we demonstrate that surface modification of reduced graphene oxide by tannic acid is a mild and effective strategy to boost its NRR activity. Such electrocatalyst is stable with an NH3 formation rate of 17.02 mu g h(-1) mg(-1)cat. in 0.5 M LiClO4, and its Faradaic efficiency can reach 4.83% at an optimized potential. The work would provide an impressive new option to boost the electrocatalytic N-2-fixing performances of carbon materials by organic molecules modification.