MOF-74 derived FeCoS2/Fe0.95S1.05 composite nano-particles via in-situ sulfurization for highly efficient electrocatalytic nitrate reduction to ammonia

被引：0

作者：

Mao, Yulin ^{[2
]}

Zhang, Shizhen ^{[2
]}

Ouyang, Ming ^{[2
,3
]}

Liu, Ping ^{[2
,3
]}

Zhang, Jiale ^{[2
,3
]}

Zhang, Guobo ^{[2
,3
]}

Chen, Ke ^{[2
,3
]}

Wang, Yiqing ^{[2
,3
]}

Wu, Ling ^{[2
,3
]}

Dong, Zhijun ^{[2
,3
]}

Lu, Zhenming ^{[2
,3
]}

Cong, Ye ^{[2
,3
]}

Li, Yanjun ^{[2
,3
]}

Yuan, Guanming ^{[1
,2
,3
]}

Zhang, Jiang ^{[1
,2
,3
]}

Li, Xuanke ^{[1
,2
,3
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China

[2] Wuhan Univ Sci & Technol, Engn Res Ctr Adv Carbon Mat, Wuhan 430081, Peoples R China

[3] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Coal Convers & New Carbon Mat, Wuhan 430081, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2025年 / 1021卷

基金：

中国国家自然科学基金;

关键词：

Ammonia synthesis; Electrocatalysts; Nitrate reduction reaction; Metal-organic frameworks; Bimetallic sulfide; METAL-ORGANIC FRAMEWORKS;

D O I：

10.1016/j.jallcom.2025.179637

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A metal-organic skeleton (MOF) -derived bimetallic sulfide catalyst, FeCoS2/Fe0.95S1.05, is proposed here for electrochemical ammonia production, which offers a sustainable and energy-saving technical solution for nitrate removal and green NH3 synthesis under environmental conditions. The catalyst benefits from the excellent conductivity and effective synergistic effect of bimetallic sulfides, and it has a NH3 yield of 2.705 mg h- 1 mgcat. - 1 , a maximum Faraday efficiency of 94.79 %, an ammonium selectivity of 96.88 %, and it also maintains good catalytic stability over 12 consecutive cycles. Theoretical and experimental results demonstrate that the incorporation of Fe into the Co site changes the electron configuration of the atoms, resulting in a more pronounced Fe-to-*NO3 electron transfer, and NO3 - can be effectively activated at the surface Fe-Co sites, thereby facilitating the NO3-RR process and realizing efficient NH3 production. Therefore, this study provides a strategy for the design of electrochemical nitrate reduction electrocatalysts.

引用

页数：8