Porous nitrogen-doped carbon nanosheets composite Fe3C synthesized by molten salt-mediated template method as efficient ORR catalyst for zinc-air batteries

被引：7

作者：

Long, Qing ^{[1
]}

Wu, Qianqi ^{[1
]}

Wen, Zhiming ^{[1
]}

Wang, Wei ^{[1
]}

Li, Chen ^{[1
]}

Tang, Huichuan ^{[1
]}

Wang, Haitao ^{[2
]}

Huang, Junlin ^{[1
]}

Chen, Liang ^{[1
]}

Li, Gangyong ^{[1
]}

Xu, Wenyuan ^{[1
]}

机构：

[1] Hunan Inst Sci & Technol, Sch Chem & Chem Engn, Key Lab Hunan Prov Adv Carbon Based Funct Mat, Yueyang 414006, Peoples R China

[2] Wuhan Inst Technol, Novel Catalyt Mat Hubei Engn Res Ctr, Engn Res Ctr Phosphorus Resources Dev & Utilizat, Sch Chem & Environm Engn,Minist Educ, Wuhan 430205, Peoples R China

来源：

CARBON LETTERS | 2025年 / 35卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Molten salt; Fe3C; N-doped carbon; ORR; Zinc-air battery; OXYGEN REDUCTION REACTION; ASSISTED SYNTHESIS; ACTIVE-SITES; ELECTROCATALYSTS; FABRICATION; ALKALINE; SURFACE;

D O I：

10.1007/s42823-024-00802-5

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Considering the intrinsic activity of non-precious metal oxygen reduction reaction (ORR) catalysts is typically lower than that of precious metal catalysts, it is crucial to focus on the rational design of their micro-morphology and active site. This paper employed a simple molten salt-mediated template method to fabricate a Fe3C composite N-doped C catalyst with a layered porous framework (Fe3C@NC). Tannic acid was utilized to form a strong coordination with iron to limit the grain size of Fe3C nanocrystals generated by high-temperature pyrolysis. Moreover, urea achieved nitrogen doping in tannic acid-derived porous carbon, while the graphite phase nitrogen-doped carbon (g-C3N4) formed by its pyrolysis, together with the molten salt-mediated environment, jointly controlled the two-dimensional sheet-like structure of the material. The optimized Fe3C@NC-800 demonstrated efficient ORR performance, with an ORR half-wave potential of 0.883 V. Its application as a cathode catalyst in a liquid zinc-air battery (ZABs) exhibits a maximum power density of 211.5 mW cm(-2), surpassing that of a Pt/C-based ZAB and indicating the potential practical utility of this material.

引用

页码：623 / 633

页数：11

共 67 条

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