As a sustainable alternative technology to the Haber–Bosch process, electrochemical N2 reduction offers the hope of directly converting N2 to NH3 at ambient conditions. However, its efficiency greatly depends on screening high‐active electrocatalysts for the N2 reduction reaction (NRR). Here, the recent experimental finding that V is an effective dopant to greatly improve the NRR performances of TiO2 toward ambient N2‐to‐NH3 fixation with excellent selectivity is reported. In 0.5 m anhydrous lithium perchlorate, V‐doped TiO2 nanorods attain a high Faradic efficiency of 15.3% and a large NH3 yield of 17.73 µg h−1 mgcat.−1 at −0.40 and −0.50 V versus reversible hydrogen electrode, respectively, rivaling the performances of most reported aqueous‐based NRR electrocatalysts. Density function theory (DFT) calculations are performed to gain further insight into the catalytic mechanism.
A Bi nanosheet array on Cu foil (Bi NS/CF) is efficient and stable for electrocatalytic N2 reduction. In 0.1 M HCl, it shows a high faradaic efficiency of 10.26% at −0.50 V vs. the reversible hydrogen electrode.
Oxygen-doped hollow carbon microtubes electrocatalyze the N2-to-NH3 fixation with a faradaic efficiency of 9.1% and a NH3 yield rate of 25.12 μg h−1 mgcat.−1 at −0.80 V and −0.85 V vs. RHE, respectively.
The MnO2–Ti3C2Tx MXene nanohybrid is efficient for ambient electrocatalytic N2-to-NH3 fixation with an NH3 yield of 34.12 μg h−1 mgcat−1 and a faradaic efficiency of 11.39%.
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