3D cauliflower-like Ni foam: a high-efficiency electrocatalyst for ammonia production via nitrite reduction

Ye Li; Xun He; Jie Chen; Xiaoya Fan; Yongchao Yao; Ling Ouyang; Yonglan Luo; Qian Liu; Shengjun Sun; Zhengwei Cai; Sulaiman Alfaifi; Juan Du; Baozhan Zheng; Xuping Sun

doi:10.1039/D3CC03121G

3D cauliflower-like Ni foam: a high-efficiency electrocatalyst for ammonia production via nitrite reduction†

Ye Li,^ab Xun He,

^b Jie Chen,^b Xiaoya Fan,^b Yongchao Yao,

^b Ling Ouyang,^b Yonglan Luo,

^b Qian Liu,^c Shengjun Sun,^d Zhengwei Cai,^d Sulaiman Alfaifi,^e Juan Du,

*^a Baozhan Zheng

*^af and Xuping Sun

*^bd

Author affiliations

* Corresponding authors

^a College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China
E-mail: dujuanchem@scu.edu.cn, zhengbaozhan@scu.edu.cn

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

^c Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China

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

^e Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia

^f College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China

Abstract

A 3D cauliflower-like Ni foam on titanium plate (Ni foam/TP) shows high electrocatalytic performance for ambient ammonia (NH₃) synthesis via nitrite (NO₂⁻) reduction. In 0.1 M phosphate-buffered saline solution with 0.1 M NO₂⁻, such Ni foam/TP attains a high NH₃ Faradaic efficiency (FE) of 95.9% and a large NH₃ yield of 742.7 μmol h⁻¹ cm⁻² at −0.8 V. Its Zn–NO₂⁻ battery offers a high power density of 6.2 mW cm⁻² and an NH₃ FE of 90.1%.

Chemical Communications

3D cauliflower-like Ni foam: a high-efficiency electrocatalyst for ammonia production via nitrite reduction†

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3D cauliflower-like Ni foam: a high-efficiency electrocatalyst for ammonia production via nitrite reduction

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