Volume 62, Issue 29 e202303794
Research Article

Optimizing Electrocatalytic Nitrogen Reduction via Interfacial Electric Field Modulation: Elevating d-Band Center in WS2-WO3 for Enhanced Intermediate Adsorption

Xiaoxuan Wang

Xiaoxuan Wang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Shuyuan Li

Shuyuan Li

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Zhi Yuan

Zhi Yuan

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Yanfei Sun

Yanfei Sun

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Zheng Tang

Zheng Tang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Xueying Gao

Xueying Gao

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Huiying Zhang

Huiying Zhang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Jingxian Li

Jingxian Li

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Shiyu Wang

Shiyu Wang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Dongchun Yang

Dongchun Yang

Institute of Chemistry Chinese Academy of Sciences, Beijing, 100029 P. R. China

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Jiangzhou Xie

Corresponding Author

Jiangzhou Xie

School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, New South Wales, 2052 Australia

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Zhiyu Yang

Corresponding Author

Zhiyu Yang

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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Yi-Ming Yan

Corresponding Author

Yi-Ming Yan

State Key Lab of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029 P. R. China

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First published: 25 May 2023
Citations: 45

Graphical Abstract

The strong interfacial electric field in WS2-WO3 can enhance the adsorption of intermediates by elevating the d-band center of W, resulting in an accelerated electrocatalytic nitrogen reduction reaction (ENRR) kinetics.

Abstract

Electrocatalytic nitrogen reduction reaction (ENRR) has emerged as a promising approach to synthesizing green ammonia under ambient conditions. Tungsten (W) is one of the most effective ENRR catalysts. In this reaction, the protonation of intermediates is the rate-determining step (RDS). Enhancing the adsorption of intermediates is crucial to increase the protonation of intermediates, which can lead to improved catalytic performance. Herein, we constructed a strong interfacial electric field in WS2-WO3 to elevate the d-band center of W, thereby strengthening the adsorption of intermediates. Experimental results demonstrated that this approach led to a significantly improved ENRR performance. Specifically, WS2-WO3 exhibited a high NH3 yield of 62.38 μg h−1 mgcat−1 and a promoted faraday efficiency (FE) of 24.24 %. Furthermore, in situ characterizations and theoretical calculations showed that the strong interfacial electric field in WS2-WO3 upshifted the d-band center of W towards the Fermi level, leading to enhanced adsorption of −NH2 and −NH intermediates on the catalyst surface. This resulted in a significantly promoted reaction rate of the RDS. Overall, our study offers new insights into the relationship between interfacial electric field and d-band center and provides a promising strategy to enhance the intermediates adsorption during the ENRR process.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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