Atomic modulation and phase engineering of MoS2 2 for boosting N2 2 reduction

被引：0

作者：

Jia, Yansong ^{[1
,2
]}

Shao, Guining ^{[1
,2
]}

Yang, Li ^{[1
,2
]}

Yang, Ruizhe ^{[3
]}

Huang, Ming ^{[3
]}

Huang, Hua ^{[4
]}

Liu, Min ^{[5
]}

Huang, Gai ^{[4
]}

Lu, Qunjie ^{[4
]}

Gu, Chaohua ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Inst Proc Equipment, Coll Energy Engn, Hangzhou 310000, Zhejiang, Peoples R China

[2] Zhejiang Univ, Hydrogen Energy Inst, Hangzhou 310000, Zhejiang, Peoples R China

[3] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, 2006 Xiyuan Ave, Chengdu 611731, Sichuan, Peoples R China

[4] Foshan Xianhu Lab, Natl Energy Key Lab New Hydrogen Ammonia Energy Te, Foshan 528200, Guangdong, Peoples R China

[5] State Grid Zhejiang Elect Power CO LTD Res Inst, Hangzhou 310000, Zhejiang, Peoples R China

来源：

MICROSTRUCTURES | 2024年 / 4卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Nitrogen reduction; heteroatom doping; molybdenum disulfide; phase engineering; NITROGEN REDUCTION; HIGH-EFFICIENCY; AMMONIA; CATALYST;

D O I：

10.20517/microstructures.2023.95

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrochemical nitrogen reduction reaction (ENRR) has emerged as a potential alternative to the conventional Haber-Bosch process for ammonia production. However, ENRR technology is still restricted by the limited Faradaic efficiency due to the hard-to-break N-N triple bond. Herein, inspired by the biomimetic catalyst, we developed a Fe-modulated MoS2 2 catalyst (named Fe@MoS2) 2 ) as an efficient ENRR catalyst. Raman spectra, coupled with the X-ray absorption spectroscopy, demonstrate the introduction of Fe into the MoS2 2 lattice and achieve partial 2H to 1T phase conversion. The presence of S-vacancies on MoS2 2 substrates was observed on scanning transmission electron microscopy images. Operando infrared absorption spectroscopy confirms that the constructed catalytic site significantly reduces barriers to nitrogen activation. The synthesized Fe@MoS2, 2 , with its superior geometric and electronic structures, exhibits a remarkable Faradaic efficiency of 19.7 +/- 5.5% at-0.2 V vs. Reversible Hydrogen Electrode and a high yield rate of 20.2 +/- 5.3 mu g h-1 mg-1 at-0.8 V vs. Reversible Hydrogen Electrode. Therefore, this work provides a fresh direction for designing novel catalysts, eventually boosting the nitrogen reduction reaction kinetics and accelerating the ENRR application.

引用

页数：11