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Degradation and lifetime evaluation of Fe-N-C based catalyst in PEMFC
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.ORCID-id: 0000-0001-9203-9313
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.ORCID-id: 0000-0002-0452-0703
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2015 (Engelska)Ingår i: Proceedings of the 6th European Fuel Cell - Piero Lunghi Conference, EFC 2015, ENEA , 2015, s. 223-224Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The restricted lifetime of Fe-N-C based catalysts is often assumed to be connected to the operating temperature. This study will investigate how the cell performance, electrode structure and composition vary over time, at different cell temperatures. At lower temperature, one may expect an increase in radical's stability, but a decrease in reactivity. Results show that the electrode degenerates over time, and that the electrochemical performance decay is similar for 40, 60, and 80° C. However, the loss of active sites is higher at higher temperature. This suggests that indirect production of radicals via H2O2 production during ORR is higher at higher temperatures and is a key degradation mechanism for this Fe-N-C catalyst.

Ort, förlag, år, upplaga, sidor
ENEA , 2015. s. 223-224
Nyckelord [en]
Degradation, NPMC, Proton exchange membrane fuel cell (PEMFC), Catalysts, Electrochemical electrodes, Electrodes, Cell temperature, Degradation mechanism, Electrochemical performance, Electrode structure, Lifetime evaluation, Lower temperatures, Operating temperature, Proton exchange membrane fuel cells (PEMFC)
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Kemi
Identifikatorer
URN: urn:nbn:se:kth:diva-202902Scopus ID: 2-s2.0-84994570920ISBN: 9788882863241 (tryckt)OAI: oai:DiVA.org:kth-202902DiVA, id: diva2:1079164
Konferens
6th European Fuel Cell Technology and Applications Conference - Piero Lunghi Conference, EFC 2015, 16 December 2015 through 18 December 2015
Anmärkning

QC 20170307

Tillgänglig från: 2017-03-07 Skapad: 2017-03-07 Senast uppdaterad: 2017-03-07Bibliografiskt granskad

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Eriksson, BjörnLindbergh, GöranWreland Lindström, RakelLagergren, Carina

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