Volume 62, Issue 38 e202308775
Research Article

Modulating Metal-Nitrogen Coupling in Anti-Perovskite Nitride via Cation Doping for Efficient Reduction of Nitrate to Ammonia

Zhiheng Gong

Zhiheng Gong

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

These authors contributed equally to this work.

Contribution: Conceptualization (equal), Data curation (lead), ​Investigation (lead), Methodology (lead), Visualization (lead), Writing - original draft (lead), Writing - review & editing (equal)

Search for more papers by this author
Xuepeng Xiang

Xuepeng Xiang

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077 P. R. China

These authors contributed equally to this work.

Contribution: Data curation (equal), Formal analysis (equal), Software (lead), Visualization (equal), Writing - review & editing (equal)

Search for more papers by this author
Wenye Zhong

Wenye Zhong

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Contribution: Formal analysis (supporting), ​Investigation (supporting)

Search for more papers by this author
Chenghao Jia

Chenghao Jia

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Contribution: Formal analysis (supporting), ​Investigation (supporting)

Search for more papers by this author
Peiyan Chen

Peiyan Chen

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Contribution: Formal analysis (supporting), ​Investigation (supporting)

Search for more papers by this author
Prof. Nian Zhang

Prof. Nian Zhang

Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204 P. R. China

Contribution: Resources (equal), Supervision (equal)

Search for more papers by this author
Prof. Shijun Zhao

Prof. Shijun Zhao

Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077 P. R. China

Contribution: Resources (equal), Software (equal)

Search for more papers by this author
Prof. Weizhen Liu

Corresponding Author

Prof. Weizhen Liu

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Contribution: Supervision (equal), Validation (equal), Visualization (equal), Writing - review & editing (supporting)

Search for more papers by this author
Prof. Yan Chen

Corresponding Author

Prof. Yan Chen

Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, School of Environment and Energy, South China University of Technology, Guangzhou, 510006 P. R. China

Contribution: Conceptualization (lead), Funding acquisition (lead), Resources (lead), Supervision (lead), Validation (lead), Writing - review & editing (lead)

Search for more papers by this author
Prof. Zhang Lin

Prof. Zhang Lin

Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, School of Metallurgy and Environment, Central South University, Changsha, 410083 P. R. China

Contribution: Conceptualization (equal), Resources (equal), Supervision (equal)

Search for more papers by this author
First published: 01 August 2023
Citations: 27

Graphical Abstract

This work demonstrates that the metal-nitrogen coupling in anti-perovskite Co4N can be effective modulated by Cu doping, leading to strongly promoted hydrogenation process during electrochemical reduction of nitrate (NO3RR) to ammonia.

Abstract

The complexes of metal center and nitrogen ligands are the most representative systems for catalyzing hydrogenation reactions in small molecule conversion. Developing heterogeneous catalysts with similar active metal-nitrogen functional centers, nevertheless, still remains challenging. In this work, we demonstrate that the metal-nitrogen coupling in anti-perovskite Co4N can be effective modulated by Cu doping to form Co3CuN, leading to strongly promoted hydrogenation process during electrochemical reduction of nitrate (NO3RR) to ammonia. The combination of advanced spectroscopic techniques and density functional theory calculations reveal that Cu dopants strengthen the Co−N bond and upshifted the metal d-band towards the Fermi level, promoting the adsorption of NO3 and *H and facilitating the transition from *NO2/*NO to *NO2H/*NOH. Consequently, the Co3CuN delivers noticeably better NO3RR activity than the pristine Co4N, with optimal Faradaic efficiency of 97 % and ammonia yield of 455.3 mmol h−1 cm−2 at −0.3 V vs. RHE. This work provides an effective strategy for developing high-performance heterogeneous catalyst for electrochemical synthesis.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.