Issue 23, 2022

Amorphous CoB nanoarray as a high-efficiency electrocatalyst for nitrite reduction to ammonia

Abstract

Electrochemical reduction of nitrite (NO2) is considered as an eco-friendly and sustainable strategy for simultaneous NH3 production and NO2 removal. However, electroreduction of NO2 is a complex reaction involving multi-electron transfer steps, thus requiring highly selective and active electrocatalysts. Herein, we report that amorphous CoB supported on TiO2 nanoarray acts as an efficient catalyst for NH3 synthesis via electrochemical NO2 reduction. In 0.1 M Na2SO4 with 400 ppm NO2, such an electrocatalyst achieves an outstanding yield of 233.1 μmol h−1 cm−2 and a high faradaic efficiency of 95.2% at −0.7 V. In addition, its performance remains stable during long-term electrolysis and cycling tests.

Graphical abstract: Amorphous CoB nanoarray as a high-efficiency electrocatalyst for nitrite reduction to ammonia

Supplementary files

Article information

Article type
Research Article
Submitted
25 juin 2022
Accepted
05 oct. 2022
First published
05 oct. 2022

Inorg. Chem. Front., 2022,9, 6075-6079

Amorphous CoB nanoarray as a high-efficiency electrocatalyst for nitrite reduction to ammonia

L. Hu, D. Zhao, C. Liu, Y. Liang, D. Zheng, S. Sun, Q. Li, Q. Liu, Y. Luo, Y. Liao, L. Xie and X. Sun, Inorg. Chem. Front., 2022, 9, 6075 DOI: 10.1039/D2QI01363K

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