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Methodology for evaluation of contributions of Ostwald ripening and particle agglomeration to growth of catalyst particles in PEM fuel cells
ID
Kregar, Ambrož
(
Avtor
),
ID
Kravos, Andraž
(
Avtor
),
ID
Katrašnik, Tomaž
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(829,82 KB)
MD5: D342A1DF5BD85D4CDE1EE58C67FE9703
URL - Izvorni URL, za dostop obiščite
https://onlinelibrary.wiley.com/doi/full/10.1002/fuce.201900208
Galerija slik
Izvleček
The degradation of the catalyst layer represents one of the main limiting factors in a wider adoption of fuel cells. The identification of the contributions of different mechanisms of catalyst degradation, namely the Ostwald ripening and particle agglomeration, is an important step in the development of mitigation strategies for increasing fuel cell reliability and prolonging its life time. In this paper, the degradation phenomena in high temperature polymer electrolyte membrane fuel cell (HT-PEMFC) are analyzed using a physically-based model of fuel cell operation and catalyst degradation, describing carbon corrosion, platinum dissolution and consequent growth of catalyst particles. The model results indicate significantly different time dependence of catalyst particle growth resulting from different mechanisms: linear growth in the case of particle agglomeration and root-like time dependence for the Ostwald ripening. Based on these results, a new analytic method is proposed, performed by the fitting of a test root-function to the time profile of the particle size growth and using best-fit parameters to identify the prevailing growth mechanism. Using this method on a particle growth time trace deduced from in situ cyclic voltammetry measurement during HT-PEMFC degradation, we are able to identify the agglomeration as the main mechanism of catalyst particle grow.
Jezik:
Angleški jezik
Ključne besede:
agglomeration
,
catalyst layer
,
degradation
,
fuel cells
,
high temperature
,
modeling
,
Ostwald ripening
,
supported catalyst
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2020
Št. strani:
Str.. 487-498
Številčenje:
Vol. 20, iss. 4
PID:
20.500.12556/RUL-126390
UDK:
519.6:621.352.6(045)
ISSN pri članku:
1615-6854
DOI:
10.1002/fuce.201900208
COBISS.SI-ID:
27359235
Datum objave v RUL:
19.04.2021
Število ogledov:
1521
Število prenosov:
229
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Fuel cells
Založnik:
Wiley
ISSN:
1615-6854
COBISS.SI-ID:
517714457
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:
19.04.2021
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
aglomeracija
,
katalitična plast
,
degradacija
,
gorivne celice
,
visokotemperaturne
,
modeliranje
,
Ostwaldovo zorenje
,
podprti katalizator
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0401
Naslov:
Energetsko strojništvo
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
AustrianResearch Promotion Agency
Številka projekta:
854867
Akronim:
SoH4PEM
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