Ambient electrochemical N2-to-NH3 conversion catalyzed by TiO2 decorated juncus effusus-derived carbon microtubes

Haijun Chen; Jie Liang; Kai Dong; Luchao Yue; Tingshuai Li; Yongsong Luo; Zhesheng Feng; Na Li; Mohamed S. Hamdy; Abdulmohsen Ali Alshehri; Yan Wang; Xuping Sun; Qian Liu

doi:10.1039/D2QI00140C

Ambient electrochemical N₂-to-NH₃ conversion catalyzed by TiO₂ decorated juncus effusus-derived carbon microtubes†

Haijun Chen,^ab Jie Liang,^c Kai Dong,

^c Luchao Yue,^c Tingshuai Li,

^c Yongsong Luo,^c Zhesheng Feng,^b Na Li,

^d Mohamed S. Hamdy,^e Abdulmohsen Ali Alshehri,^f Yan Wang,

*^b Xuping Sun

*^cd and Qian Liu*^a

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* Corresponding authors

^a Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China
E-mail: liuqian@cdu.edu.cn

^b School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
E-mail: wy@uestc.edu.cn

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

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

^e Catalysis Research Group (CRG), Department of Chemistry, College of Science, King Khalid University, P.O. Box 9004, 61413 Abha, Saudi Arabia

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

Abstract

Electrocatalytic N₂ reduction is a sustainable alternative to the Haber–Bosch process for ambient NH₃ synthesis, but it needs efficient and stable catalysts. Herein, a hybrid of TiO₂ and juncus effusus-derived carbon microtubes with a three-dimensional cross-linked hollow tubular structure is proposed as an efficient electrocatalyst for N₂-to-NH₃ conversion at ambient conditions. In 0.1 M Na₂SO₄, this catalyst offers a large NH₃ yield of 20.03 μg h⁻¹ mg_cat.⁻¹ and a high faradaic efficiency of 10.76% at −0.50 V versus the reversible hydrogen electrode, with superior electrochemical and structural stability.

Inorganic Chemistry Frontiers

Ambient electrochemical N₂-to-NH₃ conversion catalyzed by TiO₂ decorated juncus effusus-derived carbon microtubes†

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