Electrocatalysis of N 2 to NH 3 by HKUST‐1 with High NH 3 Yield

Electrolytic ammonia synthesis from nitrogen at ambient conditions is appearing as a promising alternative to the Haber‐Bosch process which is consuming high energy and emitting CO 2 . Here, a typical MOF material, HKUST‐1 (Cu−BTC, BTC=benzene‐1,3,5‐tricarboxylate), was selected as an electrocatalyst for the reaction of converting N 2 to NH 3 under ambient conditions. At −0.75 V vs. reversible hydrogen electrode, it achieves excellent catalytic performance in the electrochemical synthesis of ammonia with high NH 3 yield (46.63 μg h −1  mg −1   cat. or 4.66 μg h −1  cm −2 ) and good Faraday efficiency (2.45%). It is indicated that the good performance of the HKUST‐1 catalyst may originate from the formation of Cu(I). In addition, the catalyst also has good selectivity for N 2 to NH 3 .