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Effect of catalyst ink composition on the performance of carbon aerogel based Fe-N-C catalyst for the oxygen reduction reaction

Zierdt, Tanja and Müller-Hülstede, Julia and Schonvogel, Dana and Schettler, Jessica and Schwan, Marina and Milow, Barbara and Wagner, Peter and Friedrich, Kaspar Andreas (2022) Effect of catalyst ink composition on the performance of carbon aerogel based Fe-N-C catalyst for the oxygen reduction reaction. 6th International Symposium on Materials for Energy Storage and Conversion, 05.07.2022. - 08.07.2022, Bol, Croatia.

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Abstract

Application of Fe N C catalysts faces two main challenges. The initial performance loss during first hours of HT PEMFC operation of membrane electrode assembly (MEA) containing Fe N Cs as cathode catalyst is much higher compared to Pt/C based MEAs. This originates mainly from carbon corrosion and Fe demetalation. Moreover, the lower volumetric activity of Fe N Cs compared to Pt/C demands thicker catalyst layers, which can cause mass transport limitations. These challenges need to be overcome to use Fe N C catalysts in the HT PEMFC cathode. To minimize mass transport limitation and increase the volumetric activity porous carbon aerogels (CA) are a promising candidate for incorporation of Fe-Nx sites. The Fe N CA catalyst is produced via CA support-based synthesis including impregnation with Fe and N containing precursor, two pyrolysis steps and an acid leaching. Different catalyst ink suspensions with varied compositions of catalyst material, ethanol or 2-propanol, water and NafionTM are produced and investigated using RRDE setup to gain insights on activity and selectivity. The experiments are conducted at room temperature in diluted phosphoric acid to investigate the impact of phosphates on the activity. The results are compared to a commercial Fe N C (PMF-0011904, Pajarito Powder) catalyst. The outcomes from electrochemical and physical evaluations will provide insights into the importance of optimizing the catalyst ink for Fe N CA material. The results are important for further catalyst ink optimization for Fe N CA GDE manufacturing and their investigation under HT PEMFC conditions in a GDE half-cell setup.

Item URL in elib:https://elib.dlr.de/187675/
Document Type:Conference or Workshop Item (Poster)
Title:Effect of catalyst ink composition on the performance of carbon aerogel based Fe-N-C catalyst for the oxygen reduction reaction
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zierdt, TanjaUNSPECIFIEDhttps://orcid.org/0000-0003-1527-199X
Müller-Hülstede, JuliaUNSPECIFIEDhttps://orcid.org/0000-0001-7822-8425
Schonvogel, DanaUNSPECIFIEDhttps://orcid.org/0000-0002-2485-740X
Schettler, JessicaUNSPECIFIEDUNSPECIFIED
Schwan, MarinaUNSPECIFIEDhttps://orcid.org/0000-0001-6329-8164
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728
Wagner, PeterUNSPECIFIEDhttps://orcid.org/0000-0002-5644-9881
Friedrich, Kaspar AndreasUNSPECIFIEDhttps://orcid.org/0000-0002-2968-5029
Date:July 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Fe-N-C catalyst for the oxygen reduction reaction, carbon aerogel, HT-PEMFC, catalyst ink, gas diffusion electrode
Event Title:6th International Symposium on Materials for Energy Storage and Conversion
Event Location:Bol, Croatia
Event Type:international Conference
Event Dates:05.07.2022. - 08.07.2022
Organizer:University of Split, Croatia
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Chemical Energy Carriers
DLR - Research area:Energy
DLR - Program:E SP - Energy Storage
DLR - Research theme (Project):E - Electrochemical Processes
Location: Oldenburg
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Zierdt, Tanja
Deposited On:07 Oct 2022 10:54
Last Modified:07 Oct 2022 10:54

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