Achieving a Record‐High Yield Rate of 120.9 μ g NH 3 mg cat . − 1 h − 1 for N 2 Electrochemical Reduction over Ru Single‐Atom Catalysts

The electrochemical reduction of N 2 into NH 3 production under ambient conditions represents an attractive prospect for the fixation of N 2 . However, this process suffers from low yield rate of NH 3 over reported electrocatalysts. In this work, a record‐high activity for N 2 electrochemical reduction over Ru single atoms distributed on nitrogen‐doped carbon (Ru SAs/N‐C) is reported. At −0.2 V versus reversible hydrogen electrode, Ru SAs/N‐C achieves a Faradaic efficiency of 29.6% for NH 3 production with partial current density of −0.13 mA cm −2 . Notably, the yield rate of Ru SAs/N‐C reaches 120.9 μ gNH 3    mg cat . − 1     h − 1, which is one order of magnitude higher than the highest value ever reported. This work not only develops a superior electrocatalyst for NH 3 production, but also provides a guideline for the rational design of highly active and robust single‐atom catalysts.