Currently, NH production primarily depends on the Haber-Bosch process, which operates at elevated temperatures and pressures and leads to serious CO emissions. Electrocatalytic N reduction offers an environmentally benign approach for the sustainable synthesis of NH under ambient conditions. This work reports the development of biomass-derived amorphous oxygen-doped carbon nanosheet (O-CN) using tannin as the precursor. As a metal-free electrocatalyst for N -to-NH conversion, such O-CN shows high catalytic performances, achieving a large NH yield of 20.15 μg h mg and a high Faradic efficiency of 4.97 % at -0.6 V vs. reversible hydrogen electrode (RHE) in 0.1 m HCl at ambient conditions. Remarkably, it also exhibits high electrochemical selectivity and durability.
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