Issue 5, 2023

High-efficiency electrosynthesis of ammonia with selective reduction of nitrite over an Ag nanoparticle-decorated TiO2 nanoribbon array

Abstract

Electrochemical nitrite (NO2) reduction can yield value-added ammonia (NH3) while removing NO2 as an environmental pollutant in wastewater; however, it involves a six-electron transfer process and requires highly efficient and selective electrocatalysts. In this study, we report high-efficiency electrosynthesis of NH3via NO2 reduction enabled by an Ag nanoparticle-decorated TiO2 nanoribbon array on a titanium plate (Ag@TiO2/TP). When tested in 0.1 M NaOH containing 0.1 M NO2, such Ag@TiO2/TP shows a large NH3 yield of 514.3 μmol h−1 cm−2 and a high faradaic efficiency of 96.4% at −0.5 V vs. a reversible hydrogen electrode. Significantly, it also demonstrates excellent durability for 12 h electrolysis.

Graphical abstract: High-efficiency electrosynthesis of ammonia with selective reduction of nitrite over an Ag nanoparticle-decorated TiO2 nanoribbon array

Supplementary files

Article information

Article type
Research Article
Submitted
14 Nov 2022
Accepted
11 Jan 2023
First published
11 Jan 2023

Inorg. Chem. Front., 2023,10, 1431-1435

High-efficiency electrosynthesis of ammonia with selective reduction of nitrite over an Ag nanoparticle-decorated TiO2 nanoribbon array

X. Fan, X. He, X. Ji, L. Zhang, J. Li, L. Hu, X. Li, S. Sun, D. Zheng, Y. Luo, Y. Wang, L. Xie, Q. Liu, B. Ying and X. Sun, Inorg. Chem. Front., 2023, 10, 1431 DOI: 10.1039/D2QI02409H

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