Industrial-scale synthesis of NH₃ mainly relies on the energy-intensive Haber–Bosch technology, which not only needs harsh conditions but also produces a large amount of CO₂. Electrochemical N₂ reduction is regarded as an environmentally friendly method for artificial N₂-to-NH₃ conversion, but needs efficient catalysts for the N₂ reduction reaction (NRR). Here, we report that Sn dendrites on Sn foil act as a non-noble-metal electrocatalyst for the electrochemical NRR under ambient conditions. This electrocatalyst affords an NH₃ yield of 5.66 × 10⁻¹¹ mol s⁻¹ cm⁻² and a Faraday efficiency of 3.67% at −0.60 V versus the reversible hydrogen electrode in 0.1 M PBS (pH = 7.0), with high electrochemical durability.

中文翻译：

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锡枝晶在环境条件下用于将N2电催化还原为NH3

工业规模的NH ₃合成主要依靠高能耗的Haber-Bosch技术，该技术不仅需要苛刻的条件，而且还会产生大量的CO ₂。电化学N ₂还原被认为是将N ₂人工转化为NH _3的一种环境友好的方法，但是需要用于N ₂还原反应（NRR）的高效催化剂。在这里，我们报道在环境条件下，Sn箔上的Sn树枝状晶体作为电化学NRR的非贵金属电催化剂。该电催化剂的NH ₃收率为5.66×10 ^-11 mol s ^-1 cm ^-2与在0.1 M PBS（pH = 7.0）中的可逆氢电极相比，在-0.60 V时法拉第效率为3.67％。