Imperial College London
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ProfessorMagdaTitirici

Faculty of Engineering, Department of Chemical Engineering

Chair in Sustainable Energy Materials
 
 
 
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Contact

 

+44 (0)20 7594 5601m.titirici

 
 
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Location

 

ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ferrero:2016:10.1021/acsnano.6b01247,
author = {Ferrero, GA and Preuss, K and Marinovic, A and Jorge, AB and Mansor, N and Brett, DJL and Fuertes, AB and Sevilla, M and Titirici, M-M},
doi = {10.1021/acsnano.6b01247},
journal = {ACS Nano},
pages = {5922--5932},
title = {Fe-N-doped carbon capsules with outstanding electrochemical performance and stability for the oxygen reduction reaction in both acid and alkaline conditions},
url = {http://dx.doi.org/10.1021/acsnano.6b01247},
volume = {10},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - High surface area N-doped mesoporous carbon capsules with iron traces exhibit outstanding electrocatalytic activity for the oxygen reduction reaction in both alkaline and acidic media. In alkaline conditions, they exhibit more positive onset (0.94 V vs RHE) and half-wave potentials (0.83 V vs RHE) than commercial Pt/C, while in acidic media the onset potential is comparable to that of commercial Pt/C with a peroxide yield lower than 10%. The Fe–N-doped carbon catalyst combines high catalytic activity with remarkable performance stability (3500 cycles between 0.6 and 1.0 V vs RHE), which stems from the fact that iron is coordinated to nitrogen. Additionally, the newly developed electrocatalyst is unaffected by the methanol crossover effect in both acid and basic media, contrary to commercial Pt/C. The excellent catalytic behavior of the Fe–N-doped carbon, even in the more relevant acid medium, is attributable to the combination of chemical functions (N-pyridinic, N-quaternary, and Fe–N coordination sites) and structural properties (large surface area, open mesoporous structure, and short diffusion paths), which guarantees a large number of highly active and fully accessible catalytic sites and rapid mass-transfer kinetics. Thus, this catalyst represents an important step forward toward replacing Pt catalysts with cheaper alternatives. In this regard, an alkaline anion exchange membrane fuel cell was assembled with Fe–N-doped mesoporous carbon capsules as the cathode catalyst to provide current and power densities matching those of a commercial Pt/C, which indicates the practical applicability of the Fe–N-carbon catalyst.
AU  - Ferrero,GA
AU  - Preuss,K
AU  - Marinovic,A
AU  - Jorge,AB
AU  - Mansor,N
AU  - Brett,DJL
AU  - Fuertes,AB
AU  - Sevilla,M
AU  - Titirici,M-M
DO  - 10.1021/acsnano.6b01247
EP  - 5932
PY  - 2016///
SN  - 1936-0851
SP  - 5922
TI  - Fe-N-doped carbon capsules with outstanding electrochemical performance and stability for the oxygen reduction reaction in both acid and alkaline conditions
T2  - ACS Nano
UR  - http://dx.doi.org/10.1021/acsnano.6b01247
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000378973700036&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://pubs.acs.org/doi/10.1021/acsnano.6b01247
VL  - 10
ER  -
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