articleNature CommunicationsApr 25, 2024GOLD OA

Efficient ammonia synthesis from the air using tandem non-thermal plasma and electrocatalysis at ambient conditions

WLWei LiuMXMengyang XiaCZChao ZhaoBCBen ChongJCJiahe Chen

Xi'an Jiaotong University

PubMed
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Abstract

Abstract While electrochemical N 2 reduction presents a sustainable approach to NH 3 synthesis, addressing the emission- and energy-intensive limitations of the Haber-Bosch process, it grapples with challenges in N 2 activation and competing with pronounced hydrogen evolution reaction. Here we present a tandem air-NO x -NO x − -NH 3 system that combines non-thermal plasma-enabled N 2 oxidation with Ni(OH) x /Cu-catalyzed electrochemical NO x − reduction. It delivers a high NH 3 yield rate of 3 mmol h −1 cm −2 and a corresponding Faradaic efficiency of 92% at −0.25 V versus reversible hydrogen electrode in batch experiments, outperforming previously reported ones. Furthermore, in a flow mode concurrently…

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Topics & keywords

Topics
Keywords
  • Faraday efficiency
  • Electrochemistry
  • Electrocatalyst
  • Adsorption
  • Electrolysis
  • Hydrogen
  • Ammonia
  • Hydrogen production
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