A perovskite La2Ti2O7 nanosheet as an efficient electrocatalyst for artificial N-2 fixation to NH3 in acidic media

作者：Yu, Jiali; Li, Chengbo; Li, Bingyue; Zhu, Xiaojuan; Zhang, Rong; Ji, Lei; Tang, Dianping; Asiri, Abdullah M.; Sun, Xuping; Li, Quan^*; Liu, Shanhu^*; Luo, Yonglan^*

来源：Chemical Communications, 2019, 55(45): 6401-6404.

DOI：10.1039/c9cc02310k

• ATMOSPHERIC-PRESSURE
• ELECTROCHEMICAL SYNTHESIS
• LOW-TEMPERATURE
• NITROGEN
• AMMONIA
• POPULATION
• DINITROGEN
• REDUCTION
• WATER

The synthesis of NH3 heavily relies on the Haber-Bosch process suffering from a large amount of CO2 emission and energy consumption. Possessing eco-friendly and sustainable characteristics, electrochemical reduction is considered as a promising candidate for artificial N2 fixation under ambient conditions, but efficient electrocatalysts are crucial for the N2 reduction reaction (NRR). In this communication, we report that perovskite La2Ti2O7 nanosheets behave as an efficient NRR electrocatalyst with excellent selectivity under ambient conditions. In 0.1 M HCl, this catalyst achieves a high NH3 yield rate of 25.15 lg h 1 mgcat. 1 with a faradaic efficiency of 4.55% at 0.55 V vs. a reversible hydrogen electrode. Notably, it also shows high electrochemical stability.

• 单位
  四川师范大学; 福州大学; 西华师范大学; 河南大学; 电子科技大学