Single‐Atom Bi Alloyed Pd Metallene for Nitrate Electroreduction to Ammonia

作者：Kai Chen, Ziyu Ma, Xingchuan Li, Jilong Kang, Dongwei Ma, Ke Chu · 发表于：Advanced Functional Materials · 年份：2023 · DOI：10.1002/adfm.202209890 · 被引用次数：351 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Advanced Photocatalysis Techniques、Caching and Content Delivery

Abstract Electrochemical reduction of nitrate to ammonia (NO3RR) holds a great promise for attaining both NH3 electrosynthesis and wastewater purification. Herein, single‐atom Bi alloyed Pd metallene (Bi1Pd) is reported as a highly effective NO3RR catalyst, showing a near 100% NH3‐Faradaic efficiency with the corresponding NH3 yield of 33.8 mg h−1 cm−2 at −0.6 V versus RHE, surpassing those of almost all ever reported NO3RR catalysts. In‐depth theoretical and operando spectroscopic investigations unveil that single‐atom Bi electronically couples with its neighboring Pd atoms to synergistically activate NO3− and destabilize *NO on Bi1Pd, leading to the reduced energy barrier of the potential‐determining step (*NO→*NOH) and enhanced protonation energetics of NO3−‐to‐NH3 pathway.