Mesoporous carbons supported non-noble metal Fe-N X electrocatalysts for PEM fuel cell oxygen reduction reaction

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DOIResolve DOI: http://doi.org/10.1007/s10800-012-0497-y
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TypeArticle
Journal titleJournal of Applied Electrochemistry
ISSN0021-891X
Volume43
Issue2
Pages159169; # of pages: 11
SubjectExchange current densities; Hollow core-mesoporous shell carbons; Mesoporosity; Mesoporous carbon; Non-noble metal catalysts; Oxygen reduction reaction; Performance improvements; Ultrasonic spray pyrolysis; Carbon; Electrolysis; Electrolytic reduction; Mesoporous materials; Microporosity; Nitrogen; Precious metals; Proton exchange membrane fuel cells (PEMFC); Rotating disks; Spray pyrolysis; Ultrasonic applications; Electrocatalysts
AbstractThree types of iron-nitrogen-containing non-noble metal catalysts, supported on an ultrasonic spray pyrolysis mesoporous carbon (USPMC), a hollow core mesoporous shell carbon (HCMSC), and a standard carbon (Ketjen Black CJ600, KB), respectively, are synthesized using a wet-impregnation method. The morphologies and structure as well as composition of the synthesized carbon supports and their corresponding supported Fe-N X catalysts (namely Fe-N X /USPMC, Fe-N X /HCMSC, and Fe-N X /KB, respectively) are physically characterized using EDX, SEM, FESEM, and BET analysis, respectively. The catalytic activities of these three electrocatalysts toward oxygen reduction reaction (ORR) are measured using rotating disk electrode technique in O2-saturated 0.5 M H2SO4 solution. The catalyzed ORR exchange current densities are also obtained using the Tafel method based on the measured data. Among these three electrocatalysts, Fe-N X /HCMSC can give the best ORR performance, which is correlated to its higher nitrogen, mesopore, and micropore contents, compared to the other electrocatalysts. It is rationalized that the performance improvement of these electrocatalysts may be achieved as long as an optimal relationship among mesopores, micropores, and even macropores for increasing both ORR kinetics and reactant gases accessibility to the active sites can be found. © 2012 Springer Science+Business Media Dordrecht.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Energy, Mining and Environment (EME-EME)
Peer reviewedYes
NPARC number21269797
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Record identifier5198d8ae-d07c-4b57-8930-79dd1f12c8c6
Record created2013-12-13
Record modified2016-05-09
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