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

被引：112

作者：

Chen, Hongyu ^{[1
]}

Zhu, Xiaojuan ^{[1
]}

Huang, Hong ^{[2
]}

Wang, Huanbo ^{[3
]}

Wang, Ting ^{[1
]}

Zhao, Runbo ^{[2
]}

Zheng, Hongguo ^{[4
]}

Asiri, Abdullah M. ^{[5
,6
]}

Luo, Yonglan ^{[1
]}

Sun, Xuping ^{[1
,2
]}

机构：

[1] China West Normal Univ, Sch Chem & Chem Engn, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Sichuan, Peoples R China

[2] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China

[3] Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Peoples R China

[4] ThermoFisher Sci, Chengdu 610023, Sichuan, Peoples R China

[5] King Abdulaziz Univ, Chem Dept, Fac Sci, POB 80203, Jeddah 21589, Saudi Arabia

[6] King Abdulaziz Univ, Ctr Excellence Adv Mat Res, POB 80203, Jeddah 21589, Saudi Arabia

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 21期

关键词：

ATMOSPHERIC-PRESSURE; OXYGEN REDUCTION; N-2; FIXATION; AMMONIA; NITROGEN; NH3; WATER; TEMPERATURE; COMPOSITE;

D O I：

10.1039/c9cc00461k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 N-2 reduction offers a carbon-neutral process to convert N-2 to NH3 under ambient conditions, but it requires efficient and stable catalysts to drive the N-2 reduction reaction. Herein, we report that a sulfur dots-graphene nanohybrid acts as a metal-free electrocatalyst for ambient N-2(-) to -NH3 conversion with excellent selectivity. When operated in 0.5 M LiClO4, this electrocatalyst achieves a large NH3 yield of 28.56 lg h(-1) mgcat.(-1) and a high Faradaic efficiency of 7.07% at similar to 0.85 V vs. reversible hydrogen electrode. Notably, it also shows good electrochemical stability.

引用

页码：3152 / 3155

页数：4

共 46 条

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