Bypassing Formation of Oxide Intermediate via Chemical Vapor Deposition for the Synthesis of an Mn-N-C Catalyst with Improved ORR Activity.
Journal
ACS catalysis
ISSN: 2155-5435
Titre abrégé: ACS Catal
Pays: United States
ID NLM: 101562209
Informations de publication
Date de publication:
17 Nov 2023
17 Nov 2023
Historique:
received:
02
05
2023
revised:
16
10
2023
accepted:
16
10
2023
medline:
29
11
2023
pubmed:
29
11
2023
entrez:
29
11
2023
Statut:
epublish
Résumé
A significant barrier to the commercialization of proton exchange membrane fuel cells (PEMFCs) is the high cost of the platinum-based oxygen reduction reaction (ORR) cathode electrocatalysts. One viable solution is to replace platinum with a platinum-group metal (PGM) free catalyst with comparable activity and durability. However, PGM-free catalyst development is burdened by a lack of understanding of the active site formation mechanism during the requisite high-temperature synthesis step, thus making rational catalyst design challenging. Herein we demonstrate in-temperature X-ray absorption spectroscopy (XAS) to unravel the mechanism of site evolution during pyrolysis for a manganese-based catalyst. We show the transformation from an initial state of manganese oxides (MnO
Identifiants
pubmed: 38026812
doi: 10.1021/acscatal.3c01982
pmc: PMC10660335
doi:
Types de publication
Journal Article
Langues
eng
Pagination
14782-14791Informations de copyright
© 2023 American Chemical Society.
Déclaration de conflit d'intérêts
The authors declare no competing financial interest.
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