Acta Chimica Sinica ›› 2024, Vol. 82 ›› Issue (3): 295-302.DOI: 10.6023/A23110508 Previous Articles     Next Articles



韩晶, 廖润华*(), 邓文强, 梁博宇, 周雨晴, 任帅, 洪燕*()   

  1. 景德镇陶瓷大学 材料科学与工程学院 景德镇 333403
  • 投稿日期:2023-11-21 发布日期:2024-02-19
  • 基金资助:
    景德镇市级科技计划项目(20234NY006); 景德镇市级科技计划项目(20234SF009); 景德镇陶瓷大学研究生创新创业项目(JYC202312); 与大学本科生创新项目(X202310408145); 与大学本科生创新项目(X202310408140)

Study on Performance of Copper Doped Carbon Nitride Electrocatalyzing Nitrate to Produce Ammonia

Jing Han, Runhua Liao*(), Wenqiang Deng, Boyu Liang, Yuqing Zhou, Shuai Ren, Yan Hong*()   

  1. School of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, Jiangxi, China
  • Received:2023-11-21 Published:2024-02-19
  • Contact: *E-mail:;
  • Supported by:
    Jingdezhen municipal Science and Technology program projects(20234NY006); Jingdezhen municipal Science and Technology program projects(20234SF009); Jingdezhen Ceramic University graduate innovation and entrepreneurship project(JYC202312); Undergraduate innovation program(X202310408145); Undergraduate innovation program(X202310408140)

As the increasing demand for ammonia in other industries such as energy, the ammonia production now available can no longer meet the needs of industrial production, and the existing Haber-Bosch process for the production of NH3 will cause harm to the atmospheric environment. Therefore, there is an urgent need to find a new method that is compatible with or can replace the existing ammonia production process. Nitrate wastewater contains a large amount of nitrogen, and NH3 is one of the nitrate reduction products, the reduction of nitrate into ammonia can not only reduce the environmental pollution of nitrate nitrogen, but also alleviate the industrial demand for ammonia, nitrate wastewater treatment methods are generally physical, chemical and biological, but there are shortcomings of long cycle time and high cost. The electrocatalytic method is convenient, safe and can catalyze the synthesis of NH3 at room temperature and pressure, which makes the electrocatalytic synthesis of NH3 become a hot research topic in recent years. In this experiment, 3-amino-1,2,4-triazole was loaded into alumina crucible and used as the precursor to synthesize C3N5 by pyrolysis method in Muffle furnace, and then Cu-C3N5 was synthesized under calcination conditions by modulating the ratio of copper elements, which resulted in a series of C3N5-based catalysts with differences in material morphology, crystal conformation, and chemical valence state, including five catalysts of different proportions were synthesized. These catalysts were tested, then their electrochemical performance and electrocatalytic reduction of nitrate to produce ammonia performance were evaluated, and it was found that the ammonia yield and Faraday efficiency could reach 0.541 mmol•h−1•mgcat−1 and 87.79% by 1 h electrolysis experiments in a mixed electrolyte solution of 0.1 mol/L KOH+0.1 mol/L KNO3, which are much higher than that of C3N5, and the catalyst has good activity and stability in cyclic and long time experiments, indicating that it has some research value in the field of electrocatalytic nitrate.

Key words: electrocatalytic reduction, NH3 yield rate, Faraday efficiency, C3N5-based catalysts, nitrate