Electrochemical N2 fixation to NH3 under ambient conditions: porous LiFe5O8 nanoparticle-reduced graphene oxide as a highly efficient and selective catalyst

被引：5

作者：

Ji, Yuyao ^{[1
]}

Li, Lei ^{[1
]}

Cheng, Wendong ^{[1
]}

Xiao, Yu ^{[1
]}

Li, Chengbo ^{[2
]}

Liu, Xingquan ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu 610054, Peoples R China

[2] Sichuan Normal Univ, Coll Chem & Mat Sci, Chengdu 610068, Sichuan, Peoples R China

来源：

INORGANIC CHEMISTRY FRONTIERS | 2021年 / 8卷 / 12期

基金：

中国国家自然科学基金;

关键词：

AMMONIA-SYNTHESIS; REDUCTION; HYBRID; WATER; ELECTROCATALYST; PRESSURE; ARRAY; MOS2;

D O I：

10.1039/d1qi00419k

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Traditional NH3 production based on the Haber-Bosch process is usually accompanied by high energy consumption and a large amount of carbon dioxide emission, which are not conducive to the realization of global carbon neutralization. Electrochemical N-2 reduction is regarded as a clean strategy to deal with this problem. In this work, porous LiFe5O8 nanoparticle-reduced graphene oxide (rGO) is proposed as an efficient electrocatalyst for artificial N-2-to-NH3 fixation with excellent selectivity under ambient conditions. Electrochemical tests in 0.1 M HCl show that such a hybrid achieves a high NH3 yield of 36.025 mg h(-1) mg(cat.)(-1) and a high faradaic efficiency of 13.08% at -0.2 V vs. the reversible hydrogen electrode. Furthermore, it also exhibits structural stability. Theoretical calculations reveal that LiFe5O8-rGO can efficiently catalyze NH3 synthesis with a low energy barrier.

引用

页码：3156 / 3161

页数：6