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Soft-template synthesis of mesoporous non-precious metal catalyst with Fe-N-X/C active sites for oxygen reduction reaction in fuel cells

Title
Soft-template synthesis of mesoporous non-precious metal catalyst with Fe-N-X/C active sites for oxygen reduction reaction in fuel cells
Authors
Mun, YeongdongKIM, MIN JEONGPark, Shin-AeLee, EunsungYe, YoungjinLee, SeonggyuKim, Yong-TaeKim, SungjunKim, Ok-HeeCho, Yong-HunSung, Yung-EunLee, Jinwoo
POSTECH Authors
Lee, EunsungLee, Jinwoo
Date Issued
Mar-2018
Publisher
ELSEVIER SCIENCE BV
Abstract
We synthesized ordered mesoporous Fe/N/C with highly active Fe-N-X/C sitesdenoted as m-FePhen-C as a non precious metal catalyst (NPMC) for the oxygen reduction reaction in fuel cells. This was the first study that incorporated a catalyst precursor with Fe-N coordination directly in a simple block co-polymer-assisted soft template method for the synthesis of mesoporous Fe/N/C. The synthesized catalyst (m-FePhen-C) showed a high catalytic performance comparable to that of PVC in half-cell tests, and a membrane electrode assembly (MEA) with an m-FePhen-C cathode exhibited 40% higher power density than did an MEA with a commercial Pt/C cathode in single-cell tests, with comparable electrode thicknesses. This result is highly meaningful in that generation of the Fe-N-x/C active sites and formation of ordered mesoporous structure were achieved simultaneously in the simple soft-template-assisted process, and in that the advantages of mesoporous structure with appropriate pore size in metal-containing NPMC were elucidated for high-performance MEAs.
We synthesized ordered mesoporous Fe/N/C with highly active Fe-N-X/C sitesdenoted as m-FePhen-C as a non precious metal catalyst (NPMC) for the oxygen reduction reaction in fuel cells. This was the first study that incorporated a catalyst precursor with Fe-N coordination directly in a simple block co-polymer-assisted soft template method for the synthesis of mesoporous Fe/N/C. The synthesized catalyst (m-FePhen-C) showed a high catalytic performance comparable to that of PVC in half-cell tests, and a membrane electrode assembly (MEA) with an m-FePhen-C cathode exhibited 40% higher power density than did an MEA with a commercial Pt/C cathode in single-cell tests, with comparable electrode thicknesses. This result is highly meaningful in that generation of the Fe-N-x/C active sites and formation of ordered mesoporous structure were achieved simultaneously in the simple soft-template-assisted process, and in that the advantages of mesoporous structure with appropriate pore size in metal-containing NPMC were elucidated for high-performance MEAs.
We synthesized ordered mesoporous Fe/N/C with highly active Fe-N-X/C sitesdenoted as m-FePhen-C as a non precious metal catalyst (NPMC) for the oxygen reduction reaction in fuel cells. This was the first study that incorporated a catalyst precursor with Fe-N coordination directly in a simple block co-polymer-assisted soft template method for the synthesis of mesoporous Fe/N/C. The synthesized catalyst (m-FePhen-C) showed a high catalytic performance comparable to that of PVC in half-cell tests, and a membrane electrode assembly (MEA) with an m-FePhen-C cathode exhibited 40% higher power density than did an MEA with a commercial Pt/C cathode in single-cell tests, with comparable electrode thicknesses. This result is highly meaningful in that generation of the Fe-N-x/C active sites and formation of ordered mesoporous structure were achieved simultaneously in the simple soft-template-assisted process, and in that the advantages of mesoporous structure with appropriate pore size in metal-containing NPMC were elucidated for high-performance MEAs.
Keywords
Catalyst activity; Cathodes; Coordination reactions; Electrocatalysts; Electrodes; Electrolytic reduction; Fuel cells; Mesoporous materials; Metals; Oxygen; Platinum; Pore size; Precious metals; High catalytic performance; Membrane electrode assemblies; Mesoporous structures; Non-precious metal catalysts; Ordered mesoporous structures; Oxygen reduction reaction; Soft template methods; Soft-template synthesis; Catalysts
URI
http://oasis.postech.ac.kr/handle/2014.oak/51047
DOI
10.1016/j.apcatb.2017.10.015
ISSN
0926-3373
Article Type
Article
Citation
APPLIED CATALYSIS B-ENVIRONMENTAL, vol. 222, page. 191 - 199, 2018-03
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 LEE, EUNSUNG
Div of Advanced Materials Science
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