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@article{Mehmood:2021:10.1016/j.jcis.2021.03.081,
author = {Mehmood, A and Ali, B and Gong, M and Kim, MG and Kim, J-Y and Bae, J-H and Kucernak, A and Kang, Y-M and Nam, K-W},
doi = {10.1016/j.jcis.2021.03.081},
journal = {Journal of Colloid and Interface Science},
pages = {148--157},
title = {Development of a highly active Fe-N-C catalyst with the preferential formation of atomic iron sites for oxygen reduction in alkaline and acidic electrolytes},
url = {http://dx.doi.org/10.1016/j.jcis.2021.03.081},
volume = {596},
year = {2021}
}

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TY  - JOUR
AB  - Nitrogen-doped porous carbons containing atomically dispersed iron are prime candidates for substituting platinum-based catalysts for oxygen reduction reaction (ORR) in fuel cells. These carbon catalysts are classically synthesized via complicated routes involving multiple heat-treatment steps to form the desired Fe-Nx sites. We herein developed a highly active Fesingle bondNsingle bondC catalyst comprising of exclusive Fe-Nx sites by a simplified solid-state synthesis protocol involving only a single heat-treatment. Imidazole is pyrolyzed in the presence of an inorganic salt-melt resulting in highly porous carbon sheets decorated with abundant Fe-Nx centers, which yielded a high density of electrochemically accessible active sites (1.36 × 1019 sites g−1) as determined by the in situ nitrite stripping technique. The optimized catalyst delivered a remarkable ORR activity with a half-wave potential (E1/2) of 0.905 VRHE in alkaline electrolyte surpassing the benchmark Pt catalyst by 55 mV. In acidic electrolyte, an E1/2 of 0.760 VRHE is achieved at a low loading level (0.29 mg cm−2). In PEMFC tests, a current density of 2.3 mA cm−2 is achieved at 0.90 ViR-free under H2–O2 conditions, reflecting high kinetic activity of the optimized catalyst.
AU  - Mehmood,A
AU  - Ali,B
AU  - Gong,M
AU  - Kim,MG
AU  - Kim,J-Y
AU  - Bae,J-H
AU  - Kucernak,A
AU  - Kang,Y-M
AU  - Nam,K-W
DO  - 10.1016/j.jcis.2021.03.081
EP  - 157
PY  - 2021///
SN  - 0021-9797
SP  - 148
TI  - Development of a highly active Fe-N-C catalyst with the preferential formation of atomic iron sites for oxygen reduction in alkaline and acidic electrolytes
T2  - Journal of Colloid and Interface Science
UR  - http://dx.doi.org/10.1016/j.jcis.2021.03.081
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000645630200002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S0021979721003751?via%3Dihub
UR  - http://hdl.handle.net/10044/1/91491
VL  - 596
ER  -

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