Abstract
In this communication, we report a biomass-derived nitrogen-doped porous carbon (named as NC-800) as an electrocatalyst for the ambient conversion of N2 to NH3. The catalyst NC-800 was prepared from naturally renewable and easily available bamboo shoots, with inherently an approximate 8 wt % of N-containing components, such as the N source, in a cost-effective and environmentally benign manner. This exhibited remarkable catalytic activity with a large NH3 yield and a Faradaic efficiency as high as 16.3 μg h−mg-1cat and 27.5%, respectively, at −0.35 V versus a reversible hydrogen electrode (RHE) in 0.1 M HCl solution at ambient conditions. More importantly, the catalyst NC-800 demonstrated excellent electrochemical selectivity and stability.
Highlights
Ammonia (NH3 ), as one of the most important chemicals for industry, has been widely used as a source to synthesize fertilizer, plastics, pharmaceuticals, explosives, and so on [1]
Among all of the synthetic routes, electrocatalytic N2 reduction to NH3, ideally operating under ambient conditions with water as the hydrogen source, has been considered as a sustainable and effective way for N2 fixation and NH3 production, especially when it is powered by renewable electricity [10]
Various metal-based and metal-free catalysts have been developed for the synthesis of NH3 under mild conditions via the electrochemical N2 reduction reaction (NRR) [11,12]
Summary
Ammonia (NH3 ), as one of the most important chemicals for industry, has been widely used as a source to synthesize fertilizer, plastics, pharmaceuticals, explosives, and so on [1]. Various metal-based and metal-free catalysts have been developed for the synthesis of NH3 under mild conditions via the electrochemical N2 reduction reaction (NRR) [11,12]. (e) The obtained NH3 yield rates for NC under various potentials determined by ion verify that the detected NH3 was generated through the NRR process over NC-800, the electrolysis carried out in either solution at open circuit potential orNC-800, Ar-saturated
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