Magnetic purification of non-precious metal fuel cell catalysts for obtaining atomically dispersed Fe centers

被引：14

作者：

Nabae, Yuta ^{[1
]}

Nagata, Shinsuke ^{[1
]}

Kusaba, Keizo ^{[1
]}

Aoki, Tsutomu ^{[1
]}

Hayakawa, Teruaki ^{[1
]}

Tanida, Hajime ^{[2
]}

Imai, Hideto ^{[2
]}

Hori, Katsuaki ^{[3
]}

Yamamoto, Yuta ^{[4
]}

Arai, Shigeo ^{[4
]}

Ohyama, Junya ^{[5
]}

机构：

[1] Tokyo Inst Technol, Dept Mat Sci & Engn, Meguro Ku, 2-12-1 S8-26 Ookayama, Tokyo 1528552, Japan

[2] NISSAN ARC LTD, Device Anal Dept, 1 Natsushima Cho, Yokosuka, Kanagawa 2370061, Japan

[3] Tokyo Inst Technol, Tech Dept, Ookayama Mat Anal Div, Meguro Ku, 2-12-1 S7-26 Ookayama, Tokyo 1528552, Japan

[4] Nagoya Univ, Inst Mat & Syst Sustainabil, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan

[5] Kumamoto Univ, Fac Adv Sci & Technol, Chuo Ku, 2-39-1 Kurokami, Kumamoto 8608555, Japan

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2020年 / 10卷 / 02期

关键词：

OXYGEN REDUCTION REACTION; NITROGEN-DOPED CARBON; ZEOLITIC IMIDAZOLATE FRAMEWORKS; ACTIVE-SITES; N/C ELECTROCATALYSTS; N-X; IRON; PHTHALOCYANINE; PYROLYSIS; STABILITY;

D O I：

10.1039/c9cy02304f

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：

The development of non-precious metal oxygen reduction catalysts is vital for enabling the commercialization of proton exchange membrane fuel cells, and Fe/N/C catalysts prepared by the pyrolysis of Fe, N, and C-containing precursors have been widely studied for this purpose. The role of atomically dispersed Fe centers in the reaction mechanisms of Fe/N/C catalysts has been widely studied. This paper demonstrates a facile magnetic purification approach for obtaining atomically dispersed Fe centers for conducting superior Fe/N/C catalysis. Upon treatment of a Fe/N/C catalyst prepared by pyrolyzing Fe-containing polyimide nanoparticles with a magnet, the clustered Fe species (metallic Fe and Fe3C) observed before the purification were successfully eliminated, and atomically dispersed Fe species were clearly observed by microscopy. Comparison of the oxygen reduction activities of the Fe/N/C catalysts before and after the magnetic purification in half-cell and fuel cell testing revealed the retention of the high catalytic performances of the Fe/N/C catalysts. Furthermore, no loss in catalytic performance or durability was observed after the magnetic purification.

引用

页码：493 / 501

页数：9

共 41 条

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