Ammonia is one of the inorganic chemicals with huge productivity world-wide due to its great demand in manifold industries. Electrochemical nitrogen reduction is a suitable alternative to Haber-Bosch process due to its eco-friendly approach and non-pollutant strategy. It enhanced the interest and appetite to synthesize a competent electrocatalyst. Here in we reported the first homogeneous Ni based molecular cluster for N2 to NH3 conversion with the highest efficiency till date. The cluster is selective towards NRR rather than HER and detected the formation of NH3 as a single product. A near cubane Ni4-complex is notable for the 6e- reduction of N2 at -2.3 V vs Fc+/Fc. Weakly hexacoordinated metal center electrochemically converted into Nin(L)nn- which is responsible for the selective reduction.

Electrochemical activation of dinitrogen into ammonia by distorted Ni4O4 cubane

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27th CRSI National Symposium in Chemistry

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