TY - GEN
T1 - DURABILITY ISSUES IN PRECIOUS-GROUP-METAL FREE PEMFC CATHODES
AU - Bisello, Andrea
AU - Baricci, Andrea
AU - Casalegno, Andrea
AU - Odgaard, Madeleine
AU - Serov, Alexey
AU - Atanassov, Plamen
N1 - Publisher Copyright:
© EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference.
PY - 2017
Y1 - 2017
N2 - Replacement of noble metal catalysts used in oxygen reduction reaction (ORR) is a research goal in the proton membrane fuel cells. In this work, mass transport limiting phenomena in Fe-N-C catalyst layers are studied. A specific methodology, that combines in-situ characterization of performance and modelling activity, is adopted to elucidate the contribution of electronic/ionic transport losses in catalyst layer with controlled properties. CCL impedance spectra, which take into account ORR activation and electron, proton, and oxygen transport losses are simulated. Analysis shows that a regime of mixed ion and electron transport limitations describes correctly the main features of impedance spectra. Degradation is negligible under nitrogen at 0.6V, supporting catalysts materials oxidation or water formation as main reasons for performance loss.
AB - Replacement of noble metal catalysts used in oxygen reduction reaction (ORR) is a research goal in the proton membrane fuel cells. In this work, mass transport limiting phenomena in Fe-N-C catalyst layers are studied. A specific methodology, that combines in-situ characterization of performance and modelling activity, is adopted to elucidate the contribution of electronic/ionic transport losses in catalyst layer with controlled properties. CCL impedance spectra, which take into account ORR activation and electron, proton, and oxygen transport losses are simulated. Analysis shows that a regime of mixed ion and electron transport limitations describes correctly the main features of impedance spectra. Degradation is negligible under nitrogen at 0.6V, supporting catalysts materials oxidation or water formation as main reasons for performance loss.
KW - Electrochemical impedance spectroscopy
KW - Mass transport limitations
KW - Non platinum group metal catalysts
KW - PEMFC model
UR - http://www.scopus.com/inward/record.url?scp=85173567114&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85173567114
T3 - EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference
SP - 163
EP - 164
BT - EFC 2017 - Proceedings of the 7th European Fuel Cell Piero Lunghi Conference
A2 - Cigolotti, Viviana
A2 - Barchiesi, Chiara
A2 - Chianella, Michela
PB - ENEA
T2 - 7th European Fuel Cell Piero Lunghi Conference, EFC 2017
Y2 - 12 December 2017 through 15 December 2017
ER -