Reshaping the Cathodic Catalyst Layer for Anion Exchange Membrane Fuel Cells: From Heterogeneous Catalysis to Homogeneous Catalysis.
anion exchange membrane fuel cell
cathodic catalyst layer
homogeneous catalysis
oxygen reduction reaction
Journal
Angewandte Chemie (International ed. in English)
ISSN: 1521-3773
Titre abrégé: Angew Chem Int Ed Engl
Pays: Germany
ID NLM: 0370543
Informations de publication
Date de publication:
19 Feb 2021
19 Feb 2021
Historique:
received:
15
09
2020
pubmed:
15
11
2020
medline:
15
11
2020
entrez:
14
11
2020
Statut:
ppublish
Résumé
In anion exchange membrane fuel cells, catalytic reactions occur at a well-defined three-phase interface, wherein conventional heterogeneous catalyst layer structures exacerbate problems, such as low catalyst utilization and limited mass transfer. We developed a structural engineering strategy to immobilize a molecular catalyst tetrakis(4-methoxyphenyl)porphyrin cobalt(II) (TMPPCo) on the side chains of an ionomer (polyfluorene, PF) to obtain a composite material (PF-TMPPCo), thereby achieving a homogeneous catalysis environment inside ion-flow channels, with greatly improved mass transfer and turnover frequency as a result of 100 % utilization of the catalyst molecules. The unique structure of the homogeneous catalysis system comprising interconnected nanoreactors exhibits advantages of low overpotential and high fuel-cell power density. This strategy of reshaping of the catalyst layer structure may serve as a new platform for applications of many molecular catalysts in fuel cells.
Identifiants
pubmed: 33188558
doi: 10.1002/anie.202012547
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4049-4054Subventions
Organisme : National Natural Science Foundation of China
ID : 21676241, U1732111 and 21978260
Organisme : Royal Society's International Exchange Scheme
ID : IES\R3\170134
Organisme : Italian Ministry of MUIR Italy
ID : 2017YH9MRK
Informations de copyright
© 2020 Wiley-VCH GmbH.
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