Issue 14, 2022

High-performance electrochemical nitrate reduction to ammonia under ambient conditions using NiFe2O4 nanosheet arrays

Abstract

Ambient ammonia synthesis via the electrochemical reduction of nitrate (NO3) offers us a sustainable alternative to the industrial energy-intensive Haber–Bosch process. Here, we report on the development of NiFe2O4 nanosheet arrays on carbon cloth (NiFe2O4/CC) for high-efficiency NH3 electrosynthesis via the selective reduction of NO3 under ambient conditions. When operated in 0.1 M phosphate-buffered solution with additional 0.1 M NaNO3, such NiFe2O4/CC achieves a remarkable faradaic efficiency of 96.6% and a high NH3 yield of up to 10.3 mg h−1 cm−2. Furthermore, it possesses excellent electrochemical and structural stability. The theoretical calculations reveal that the metallic NiFe2O4 surface has strong interactions with NO3 and can seriously inhibit the HER aiding in more efficient NO3 reduction to NH3.

Graphical abstract: High-performance electrochemical nitrate reduction to ammonia under ambient conditions using NiFe2O4 nanosheet arrays

Supplementary files

Article information

Article type
Research Article
Submitted
17 Agd 2022
Accepted
20 Cax 2022
First published
21 Cax 2022

Inorg. Chem. Front., 2022,9, 3392-3397

High-performance electrochemical nitrate reduction to ammonia under ambient conditions using NiFe2O4 nanosheet arrays

L. Xie, L. Hu, Q. Liu, S. Sun, L. Zhang, D. Zhao, Q. Liu, J. Chen, J. Li, L. Ouyang, A. A. Alshehri, Q. Kong and X. Sun, Inorg. Chem. Front., 2022, 9, 3392 DOI: 10.1039/D2QI00827K

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