Ammonia, besides being a friend to the farmers, has been recognized as the future renewable energy sourced fuel because of its wide-ranging applications in H₂ storage and transportation sector. In order to avoid the environmentally hazardous Haber-Bosch process, the third-generation ambient ammonia synthesis has been evolved via the direct dinitrogen reduction, electrochemically. To scale up the process, tremendous efforts are devoted to develop efficient electrocatalysts that would circumvent the bottlenecks of the electrochemical nitrogen reduction reaction (eNRR) like competitive hydrogen evolution reaction, poor selectivity of N₂ on catalyst surface etc. Transition metal or heteroatom doped carbonaceous catalysts are much surveyed for this purpose, because of their superior conductivity and charge redistribution over the active sites, favoring eNRR. Herein, we report the synthesis of a Co and B co-doped carbon matrix via a single step pyrolysis technique. The conductive carbon support, the 3d_z²-2p_z coupling between Co and B and the compatibility of B-2p_z orbital with the N-2p_z orbital altogether facilitates N₂ adsorption on the active sites. This is reflected in the high yield (102 μg h^-1 mg_cat^-1) of ammonia production at -0.4 V vs RHE on the Co,B/N-C catalyst with a Faradaic efficiency of 13.5 % in 0.1 M HCl medium. This offers a cost-effective electrode material via a simple synthesis approach for the efficient ammonia synthesis.