Abstract
We report the development of MOF-derived nitrogen-doped carbon/Co3O4 nanocomposites (Co3O4@NCs) with core-shell structures 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 mgcat.-1 and a faradaic efficiency of 8.5% at -0.2 V versus reversible hydrogen electrode. Experimental results show that the great N2 reduction reaction 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 can further enhance the electrochemical activity for producing NH3.
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