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MOF-derived Co3O4@NC with core-shell structures for N2 electrochemical reduction under ambient conditions.

We report the development of MOF-derived nitrogen-doped carbon/Co3O4 nanocomposites (Co3O4@NC) with core-shell structure as an efficient electrocatalyst for the artificial nitrogen fixation at room temperature and atmospheric pressure in 0.05 M H2SO4. It exhibits a high NH3 yield of 42.58 μg h-1 mg-1cat. and a Faradaic efficiency of 8.5% at -0.2 V vs. reversible hydrogen electrode. Experimental results show that the great NRR performance of Co3O4@NCs originates from the synergistic effects of N-doped carbon and Co3O4 with significant oxygen vacancy. In addition, we speculate that the core-shell structure maybe can further enhance the electrochemical activity for the NH3-producing.