2020/02/21 by Yueyu Tong, Haipeng Guo, Daolan Liu +7 · 5 citations
Chemical Engineering · Energy · Materials Science · #Advanced Photocatalysis Techniques #Ammonia Synthesis and Nitrogen Reduction #Hydrogen Storage and Materials
paper · doi:10.1002/anie.202002029
openalex publication_date 2020/02/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract The electrochemical nitrogen reduction reaction (NRR) is a promising energy‐efficient and low‐emission alternative to the traditional Haber–Bosch process. Usually, the competing hydrogen evolution reaction (HER) and the reaction barrier of ambient electrochemical NRR are significant challenges, making a simultaneous high NH 3 formation rate and high Faradic efficiency (FE) difficult. To give effective NRR electrocatalysis and suppressed HER, the surface atomic structure of W 18 O 49 , which has exposed active W sites and weak binding for H 2 , is doped with Fe. A high NH 3 formation rate of 24.7 μg h −1 mg cat −1 and a high FE of 20.0 % are achieved at an overpotential of only −0.15 V versus the reversible hydrogen electrode. Ab initio calculations reveal an intercalation‐type doping of Fe atoms in the tunnels of the W 18 O 49 crystal structure, which increases the oxygen vacancies and exposes more W active sites, optimizes the nitrogen adsorption energy, and facilitates the electrocatalytic NRR.