MOF-derived carbon nanotubes as an highly active electrocatalyst for oxygen reduction reaction in alkaline and acidic media

被引：4

作者：

Wang, Zhengmin ^{[1
,2
]}

Meng, Xiangzhi ^{[1
,2
]}

Wang, Haibin ^{[1
,2
]}

Bao, Lixia ^{[1
,2
]}

Li, Chunlei ^{[1
,2
]}

Cong, Yuanyuan ^{[1
,2
]}

Zhao, Qiuping ^{[1
,2
]}

机构：

[1] Lanzhou Univ Technol, Sch Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China

[2] Lanzhou Univ Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Gansu, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2023年 / 18卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Metal-organic frameworks; Electrocatalyst; Oxygen reduction reaction; Fuel cells; EFFICIENT; FE; OXIDATION; CATALYSTS; SITES; NI;

D O I：

10.1016/j.ijoes.2023.100131

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The high-activity and low-cost electrocatalyst for oxygen reduction reaction (ORR) is important for proton ex-change membrane fuel cells (PEMFCs). In this work, nitrogen-doped carbon nanotubes (Fe/N@CNT) prepared by pyrolyzing metal-organic skeleton materials Fe-ZIF-8 and g-C3N4 were used as electrocatalyst for oxygen reduction reaction. During the pyrolysis process, a large amount of nitrogen-containing gas is released which anchors Fe2+ ions in ZIF-8, forming an ORR catalytically active center (Fe-Nx). The as-synthesized Fe/N@CNT is a porous carbon material with high specific surface area (821.9 m2 g-1). The optimal Fe/N@CNT exhibits excellent ORR electrocatalytic activity with high half-wave potential (E1/2) of 0.892 V vs. RHE, which was 34 mV higher than that of commercial Pt/C (0.858 V vs. RHE) in 0.1 M KOH; E1/2 of Fe/N@CNT in 0.1 M HClO4 was 0.79 V vs. RHE, which was close to that of commercial Pt/C (0.88 V vs. RHE). Additionally, Fe/N@CNT shows long-term stability both in alkaline and acidic medium. The excellent electrocatalytic activity of Fe/N@CNT attributed to the rich micropores and mesopores structure and large specific surface area. This work offers a new approach to design and synthesize catalysts for ORR.

引用

页数：9

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