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Updated: Feb 11, 2026

Ammonia Synthesis at Low Pressure
Published on: August 23, 2017
Construction of CuO/Co3O4 Heterojunction Catalyst for High-Efficiency Ammonia Synthesis via Nitrate Reduction
Sha Song1, Zhiwei Wang2, Xinxiang Pei2
1Institute of Mold Technology, Changzhou Vocational Institute of Mechatronic Technology, Changzhou, China.
None:
Electrochemical nitrate reduction reaction (NO3RR) offers a sustainable approach to convert nitrate pollutants into ammonia (NH3). However, challenges such as low NH3 yield, competition from the hydrogen evolution reaction (HER), and limited nitrate adsorption restrict its efficiency. Here, we developed CuO/Co3O4 heterojunction catalysts with strong interfacial coupling that synergistically modulate the electronic structure to promote efficient electron transfer. This enhances nitrate adsorption and activation while suppressing HER by accelerating active hydrogen species formation. The catalyst demonstrated a high Faradaic efficiency (FE) of 94.58%, accompanied by an NH3 production rate of 2306.44 µmol h-1 mg-1. Notably, it exhibited exceptional durability.
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