Efficient nitric oxide electroreduction toward ambient ammonia synthesis catalyzed by a CoP nanoarray

Jie Liang; Wen-Feng Hu; Bingyi Song; Ting Mou; Longcheng Zhang; Yongsong Luo; Qian Liu; Abdulmohsen Ali Alshehri; Mohamed S. Hamdy; Li-Ming Yang; Xuping Sun

doi:10.1039/D2QI00002D

Efficient nitric oxide electroreduction toward ambient ammonia synthesis catalyzed by a CoP nanoarray†

Jie Liang,^a Wen-Feng Hu,^b Bingyi Song,^b Ting Mou,^a Longcheng Zhang,

^a Yongsong Luo,^a Qian Liu,*^c Abdulmohsen Ali Alshehri,^d Mohamed S. Hamdy,^e Li-Ming Yang*^b and Xuping Sun

*^a

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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: xpsun@uestc.edu.cn

^b Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Materials Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
E-mail: Lmyang@hust.edu.cn

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

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

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

Abstract

The ever-increasing anthropic NO emission from fossil fuel combustion has resulted in a series of severe environmental issues. Ambient electrocatalytic NO reduction has emerged as a promising route for sustainable NO abatement and energy-saving NH₃ synthesis, but it is kinetically complex and energetically challenging, thus requiring electrocatalysts with high activity and selectivity. Herein, we demonstrate the direct use of a CoP nanowire array on Ti mesh (CoP/TM) as an efficient hydroprocessing catalyst for electrochemically converting NO to NH₃. This monolithic catalyst achieves a faradaic efficiency of 88.3% and an NH₃ yield of 47.22 μmol h⁻¹ cm⁻², much superior to its Co(OH)F counterpart (30.3%, 4.21 μmol h⁻¹ cm⁻²). Significantly, it exhibits high durability and negligible activity decay for 14 h bulk electrolysis. The excellent electrocatalytic NO reduction activity of our CoP/TM is demonstrated further by using it as a Zn–NO battery cathode catalyst. Theoretical calculations reveal the catalytic mechanisms.

This article is part of the themed collection: Energy Frontiers: Electrochemistry and Electrochemical Engineering

Inorganic Chemistry Frontiers

Efficient nitric oxide electroreduction toward ambient ammonia synthesis catalyzed by a CoP nanoarray†

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