Volume 7, Issue 3 2201463
Research Article

To Molecularly Block Hydrogen Evolution Sites of Molybdenum Disulfide toward Improved Catalytic Performance for Electrochemical Nitrogen Reduction

Poe Ei Phyu Win

Poe Ei Phyu Win

Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215006 China

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Dongxue Yu

Dongxue Yu

Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215006 China

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Wenjuan Song

Wenjuan Song

Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215006 China

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Xiang Huang

Corresponding Author

Xiang Huang

Department of Physics, Southern University of Science and Technology, Shenzhen, 518055 China

E-mail: [email protected]; [email protected]; [email protected]

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Peng Zhu

Corresponding Author

Peng Zhu

Department of Chemistry, Tsinghua University, Beijing, 100084 China

E-mail: [email protected]; [email protected]; [email protected]

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Guanyu Liu

Guanyu Liu

School of Materials Science and Engineering, Tongji University, Shanghai, 201804 China

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Jiong Wang

Corresponding Author

Jiong Wang

Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215006 China

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu, 215123 China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 06 January 2023
Citations: 2

Abstract

2H-molybdenum disulfide (2H-MoS2) represents a classical catalyst for the electrochemical N2 reduction reaction (NRR) in water that offers a promising technology toward sustainable production of NH3 driven by renewable energy. While the catalytic efficiency is severely limited by a simultaneous and competing H2 evolution reaction (HER). Herein, it is proposed that the S edge of 2H-MoS2, which is known as main sites to afford HER, is intentionally covered by cobalt phthalocyanine (CoPc) molecules through axial coordination. While the Mo sites with S vacancies at 2H-MoS2 edge is recognized as highly NRR active, and can keep structurally intact in the CoPc based modification. The resultant composite thus exhibits high NRR performance with Faradic efficiency and NH3 yields increase by fourfold and twofold, respectively, comparing to pristine 2H-MoS2. These findings provide a deep insight into the mechanism of 2H-MoS2 based NRR catalysis and suggest an efficient molecular modification strategy to promote NRR in water.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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