Enhanced electrocatalytic nitrite reduction to ammonia over P-doped TiO2 nanobelt array

Ling Ouyang; Xun He; Shengjun Sun; Yongsong Luo; Dongdong Zheng; Jie Chen; Yinwei Li; Yuxiao Lin; Qian Liu; Abdullah M. Asiri; Xuping Sun

doi:10.1039/D2TA06933D

Enhanced electrocatalytic nitrite reduction to ammonia over P-doped TiO₂ nanobelt array†

Ling Ouyang,^a Xun He,

^a Shengjun Sun,^b Yongsong Luo,^a Dongdong Zheng,^a Jie Chen,*^c Yinwei Li,^d Yuxiao Lin,*^d Qian Liu,^e Abdullah M. Asiri

^f and Xuping Sun

*^ab

Author affiliations

* Corresponding authors

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

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

^c Department of Laboratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China
E-mail: chenjie_wch@163.com

^d School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, Jiangsu, China
E-mail: linyuxiaochris@126.com

^e Institute for Advanced Study, Chengdu University, Chengdu 610068, Sichuan, China
E-mail: liuqian@cdu.edu.cn

^f Chemistry Department, Faculty of Science & Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia

Abstract

Electrochemical nitrite reduction affords an eco-friendly route for the removal of hazardous NO₂⁻ and sustainable NH₃ synthesis. Here, we report that a P-doped TiO₂ nanobelt array supported on titanium plate (P-TiO₂/TP) acts as a high-efficiency electrocatalyst for the NO₂⁻ reduction reaction, attaining a satisfactory faradaic efficiency of 90.6% and a large NH₃ yield as high as 560.8 μmol h⁻¹ cm⁻², superior to pristine TiO₂/TP. Moreover, the catalytic mechanism involved is also uncovered by theoretical calculation.

Journal of Materials Chemistry A

Enhanced electrocatalytic nitrite reduction to ammonia over P-doped TiO₂ nanobelt array†

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Enhanced electrocatalytic nitrite reduction to ammonia over P-doped TiO₂ nanobelt array

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Journal of Materials Chemistry A