Enclosing the nitrogen cycle: Ammonia synthesis by NOx reduction |
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Affiliation: | School of Chemical and Biomolecular Engineering, Sydney Nano Institute, The University of Sydney, New South Wales, 2006, Australia |
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Abstract: | Nitrogen cycling (N2-NOx-NH3) is essential for maintaining life as it is crucial in fertilizers and nucleic acids. However, the current NH3 synthesis (N2-to-NH3) for fertilizers and energy requires large amounts of fossil fuels and greenhouse gas emissions, compromising its eco-economic significance. Meanwhile, approaches like selective catalytic reaction are applied to neutralize the toxic NOx into N2 but call for value-added NH3 as the reduction agent. In this regard, directly converting harmful NOx, one of the major environmental pollutants, into NH3 is a promising way to balance the nitrogen cycle eco-friendly, which is still in its infancy. Recently, the electrocatalytic NOx reduction reaction (NOxRR) unveiled a potential route for the NOx-to-NH3 conversion. This review presents the latest progress in the electrocatalytic NOxRR in reaction mechanism and catalysts design. It will provide a comprehensive understanding to guide future research in NOxRR, aiming to offer sustainable chemistry and energy feedstocks for the carbon-zero economy. |
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Keywords: | Reduction reaction Catalysts Electrocatalysis |
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