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A perovskite La₂Ti₂O₇ nanosheet as an efficient electrocatalyst for artificial N₂ fixation to NH₃ in acidic media

Author:
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
Source:
Chemical communications 2019 v.55 no.45 pp. 6401-6404
ISSN:
1364-548X
Subject:
ammonia, carbon dioxide, catalysts, chemical reactions, electrochemistry, electrodes, energy, greenhouse gas emissions, hydrochloric acid, hydrogen, nanosheets, nitrogen, nitrogen fixation
Abstract:
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 μg 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.
Agid:
6458836