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Issue 21, 2019
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Sulfur dots–graphene nanohybrid: a metal-free electrocatalyst for efficient N2-to-NH3 fixation under ambient conditions

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Abstract

NH3 is an important chemical with a wide range of applications, but its synthesis mainly relies upon the harsh Haber–Bosch process with huge CO2 emission. Electrochemical N2 reduction offers a carbon-neutral process to convert N2 to NH3 under ambient conditions, but it requires efficient and stable catalysts to drive the N2 reduction reaction. Herein, we report that a sulfur dots–graphene nanohybrid acts as a metal-free electrocatalyst for ambient N2-to-NH3 conversion with excellent selectivity. When operated in 0.5 M LiClO4, this electrocatalyst achieves a large NH3 yield of 28.56 μg h−1 mgcat.−1 and a high Faradaic efficiency of 7.07% at −0.85 V vs. reversible hydrogen electrode. Notably, it also shows good electrochemical stability.

Graphical abstract: Sulfur dots–graphene nanohybrid: a metal-free electrocatalyst for efficient N2-to-NH3 fixation under ambient conditions

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Publication details

The article was received on 18 Jan 2019, accepted on 18 Feb 2019 and first published on 19 Feb 2019


Article type: Communication
DOI: 10.1039/C9CC00461K
Chem. Commun., 2019,55, 3152-3155

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    Sulfur dots–graphene nanohybrid: a metal-free electrocatalyst for efficient N2-to-NH3 fixation under ambient conditions

    H. Chen, X. Zhu, H. Huang, H. Wang, T. Wang, R. Zhao, H. Zheng, A. M. Asiri, Y. Luo and X. Sun, Chem. Commun., 2019, 55, 3152
    DOI: 10.1039/C9CC00461K

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