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Nano Research 2022, 15(5): 3991-3999 https://doi.org/10.1007/s12274-022-4097-9
Research Article | Issue | Published: 08 February 2022

Sulfur-deficient Bi2S3-x synergistically coupling Ti3C2Tx-MXene for boosting electrocatalytic N2 reduction

Show Author's Information Yaojing Luo§,  Peng Shen§,  Xingchuan Li,  Yali Guo,  Ke Chu( )
School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

§ Yaojing Luo and Peng Shen contributed equally to this work.

Keywords:
MXene, electrocatalytic nitrogen reduction, interface engineering, bismuth catalyst, vacancy engineering
Topics:
Catalytic
Cite this article:
Luo Y, Shen P, Li X, et al. Sulfur-deficient Bi2S3-x synergistically coupling Ti3C2Tx-MXene for boosting electrocatalytic N2 reduction. Nano Research, 2022, 15(5): 3991-3999. https://doi.org/10.1007/s12274-022-4097-9
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Abstract Full text Electronic supplementary material About this article

Electrocatalytic nitrogen reduction reaction (NRR) is an appealing route for the sustainable NH3 synthesis, while developing efficient and durable NRR catalysts remains at the heart of achieving high-efficiency N2-to-NH3 electrocatalysis. Herein, we rationally combine vacancy and interface engineering to design sulfur-deficient Bi2S3 nanoparticles decorated Ti3C2Tx-MXene as an effective NRR catalyst. The developed Bi2S3 nanoparticles decorated Ti3C2Tx-MXene (Bi2S3-x/Ti3C2Tx) naturally contained abundant S-vacancies and exhibited a dramatically boosted NRR activity with an NH3 yield of 68.3 μg·h−1·mg−1 (−0.6 V) and a Faradaic efficiency of 22.5% (−0.4 V), far superior to pure Bi2S3 and Ti3C2Tx, and surpassing almost all ever reported Bi- and MXene-based NRR catalysts. Theoretical investigations unveiled that the exceptional NRR activity of Bi2S3-x/Ti3C2Tx stemmed from its dual-active-center system involving both S-vacancies and interfacial-Bi sites, which could synergistically promote N2 adsorption and *N2H formation to result in an energetic-favorable NRR process.


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Electronic supplementary material
About this article

Sulfur-deficient Bi2S3-x synergistically coupling Ti3C2Tx-MXene for boosting electrocatalytic N2 reduction

Show Author's information Yaojing Luo§, Peng Shen§, Xingchuan Li, Yali Guo, Ke Chu( )
School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

§ Yaojing Luo and Peng Shen contributed equally to this work.

Abstract

Electrocatalytic nitrogen reduction reaction (NRR) is an appealing route for the sustainable NH3 synthesis, while developing efficient and durable NRR catalysts remains at the heart of achieving high-efficiency N2-to-NH3 electrocatalysis. Herein, we rationally combine vacancy and interface engineering to design sulfur-deficient Bi2S3 nanoparticles decorated Ti3C2Tx-MXene as an effective NRR catalyst. The developed Bi2S3 nanoparticles decorated Ti3C2Tx-MXene (Bi2S3-x/Ti3C2Tx) naturally contained abundant S-vacancies and exhibited a dramatically boosted NRR activity with an NH3 yield of 68.3 μg·h−1·mg−1 (−0.6 V) and a Faradaic efficiency of 22.5% (−0.4 V), far superior to pure Bi2S3 and Ti3C2Tx, and surpassing almost all ever reported Bi- and MXene-based NRR catalysts. Theoretical investigations unveiled that the exceptional NRR activity of Bi2S3-x/Ti3C2Tx stemmed from its dual-active-center system involving both S-vacancies and interfacial-Bi sites, which could synergistically promote N2 adsorption and *N2H formation to result in an energetic-favorable NRR process.

Keywords: MXene, electrocatalytic nitrogen reduction, interface engineering, bismuth catalyst, vacancy engineering

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Acknowledgements

Publication history

Received: 09 July 2021
Revised: 07 December 2021
Accepted: 26 December 2021
Published: 08 February 2022
Issue date: May 2022

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Nos. 51761024 and 52161025), Natural Science Foundation of Gansu Province (No. 20JR10RA241), Longyuan Youth Innovative and Entrepreneurial Talents Project (No. [2021]17), and “Longyuan Young Talents” Program of Gansu Province.

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