Efficient electrocatalytic nitric oxide reduction to ammonia using manganese spinel oxides

CoMn 2 O 4 /C is constructed for the electrochemical NO reduction reaction toward NH 3 , with a maximum NH 3 faradaic efficiency of 89.3% at −0.7 V vs. RHE. CoMn 2 O 4 /C can promote the hydrogenation of *NO to *NHO (PDS, 0.13 eV) and inhibit the HER.