High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Xun He; Zixiao Li; Jie Yao; Kai Dong; Xiuhong Li; Long Hu; Shengjun Sun; Zhengwei Cai; Dongdong Zheng; Yongsong Luo; Binwu Ying; Mohamed S. Hamdy; Lisi Xie; Qian Liu; Xuping Sun

iScience (Jul 2023)

High-efficiency electrocatalytic nitrite reduction toward ammonia synthesis on CoP@TiO2 nanoribbon array

Xun He,
Zixiao Li,
Jie Yao,
Kai Dong,
Xiuhong Li,
Long Hu,
Shengjun Sun,
Zhengwei Cai,
Dongdong Zheng,
Yongsong Luo,
Binwu Ying,
Mohamed S. Hamdy,
Lisi Xie,
Qian Liu,
Xuping Sun

Affiliations

Xun He: Institute for Advanced Study, Chengdu University, Chengdu, Sichuan 610106, China; Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Zixiao Li: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Jie Yao: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Kai Dong: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Xiuhong Li: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Long Hu: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Shengjun Sun: College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong 250014, China
Zhengwei Cai: College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong 250014, China
Dongdong Zheng: College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong 250014, China
Yongsong Luo: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Binwu Ying: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
Mohamed S. Hamdy: Catalysis Research Group (CRG), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413 Abha, Saudi Arabia
Lisi Xie: Institute for Advanced Study, Chengdu University, Chengdu, Sichuan 610106, China
Qian Liu: Institute for Advanced Study, Chengdu University, Chengdu, Sichuan 610106, China; Corresponding author
Xuping Sun: Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China; College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong 250014, China; Corresponding author

Journal volume & issue: Vol. 26, no. 7
p. 107100

Abstract

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Summary: Electrochemical reduction of nitrite (NO2−) can satisfy the necessity for NO2− contaminant removal and deliver a sustainable pathway for ammonia (NH3) generation. Its practical application yet requires highly efficient electrocatalysts to boost NH3 yield and Faradaic efficiency (FE). In this study, CoP nanoparticle-decorated TiO2 nanoribbon array on Ti plate (CoP@TiO2/TP) is verified as a high-efficiency electrocatalyst for the selective reduction of NO2− to NH3. When measured in 0.1 M NaOH with NO2−, the freestanding CoP@TiO2/TP electrode delivers a large NH3 yield of 849.57 μmol h−1 cm−2 and a high FE of 97.01% with good stability. Remarkably, the subsequently fabricated Zn–NO2− battery achieves a high power density of 1.24 mW cm−2 while delivering a NH3 yield of 714.40 μg h−1 cm−2.

Published in iScience

ISSN: 2589-0042 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science
Website: http://www.cell.com/iscience/home

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