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

Chemical Communications : Chem Comm
Hongyu ChenXuping Sun

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.

References

May 15, 2003·Angewandte Chemie·Robert Schlögl
Mar 22, 2008·Angewandte Chemie·Gerhard Ertl
May 15, 2009·Chemical Reviews·Victor RoscaMarc T M Koper
Jan 29, 2014·Chemical Reviews·Brian M HoffmanLance C Seefeldt
Sep 25, 2018·Chemical Communications : Chem Comm·Hehan HuangXuping Sun
Nov 2, 2018·Chemical Communications : Chem Comm·Ling ZhangXuping Sun
Jan 30, 2019·ACS Central Science·Xiang RenXuping Sun

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Citations

Jun 13, 2019·Chemical Communications : Chem Comm·Ting WangXuping Sun
May 24, 2019·Chemistry : a European Journal·Lili ZhangHaihui Wang
Apr 8, 2020·Nanoscale·Xudong Wen, Jingqi Guan
Mar 24, 2020·ChemSusChem·Xian-Wei LvZhong-Yong Yuan
Feb 6, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Jin WangJinping Li
Jan 16, 2021·Journal of Molecular Modeling·Jin-Rong HuoChao-Zheng He
Jun 11, 2021·ACS Applied Materials & Interfaces·Zechuan DaiHongjing Wang
Jul 9, 2021·Chemical Communications : Chem Comm·Debabrata ChandaXuping Sun
Aug 20, 2019·ACS Applied Materials & Interfaces·Ke ChuHu Zhang
Nov 10, 2021·ACS Nano·Mandira MajumderKolleboyina Jayaramulu

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Methods Mentioned

BETA
X-ray
transmission electron microscopy
nuclear magnetic resonance

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