High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO2 nanobelt array

Ling Ouyang; Xiaoya Fan; Zerong Li; Xun He; Shengjun Sun; Zhengwei Cai; Yongsong Luo; Dongdong Zheng; Binwu Ying; Jing Zhang; Abdulmohsen Ali Alshehri; Yan Wang; Ke Ma; Xuping Sun

doi:10.1039/D2CC06261E

High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO₂ nanobelt array†

Ling Ouyang,^a Xiaoya Fan,^a Zerong Li,^a Xun He,

^a Shengjun Sun,^b Zhengwei Cai,^b Yongsong Luo,^a Dongdong Zheng,^a Binwu Ying,

^a Jing Zhang,^c Abdulmohsen Ali Alshehri,*^d Yan Wang,

*^a Ke Ma*^e and Xuping Sun

*^ab

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* Corresponding authors

^a Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China
E-mail: wy@uestc.edu.cn, xpsun@uestc.edu.cn, xpsun@sdnu.edu.cn

^b College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China

^c Interdisciplinary Materials Research Center, Institute for Advanced Study, Chengdu University, Chengdu 610106, China

^d Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia

^e Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
E-mail: drmake@scu.edu.cn

Abstract

Electrochemical nitrite (NO₂⁻) reduction is a potential and sustainable route to produce high-value ammonia (NH₃), but it requires highly active electrocatalysts. Herein, Cu nanoparticles anchored on a TiO₂ nanobelt array on a titanium plate (Cu@TiO₂/TP) are reported as a high-efficiency electrocatalyst for NO₂⁻-to-NH₃ conversion. The designed Cu@TiO₂/TP catalyst exhibits outstanding catalytic performance toward the NO₂⁻RR, with a high NH₃ yield of 760.5 μmol h⁻¹ cm⁻² (237.7 μmol h⁻¹ mg_cat.⁻¹) and an excellent faradaic efficiency of 95.3% in neutral solution. Meanwhile, it also presents strong electrochemical stability during cyclic tests and long-term electrolysis.

This article is part of the themed collection: ChemComm Most Popular 2023 Articles

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High-efficiency electroreduction of nitrite to ammonia on a Cu@TiO₂ nanobelt array†

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