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Simultaneously Incorporating Atomically Dispersed Co‐Nx Sites with Graphitic Carbon Layer‐Wrapped Co9S8 Nanoparticles for Oxygen Reduction in Acidic Electrolyte

Authors :
Dr. Jun Wu
Mengjun Gong
Wuyi Zhang
Dr. Asad Mehmood
Prof. Jinfeng Zhang
Dr. Ghulam Ali
Prof. Dr. Anthony Kucernak
Source :
ChemElectroChem, Vol 10, Iss 12, Pp n/a-n/a (2023)
Publication Year :
2023
Publisher :
Wiley-VCH, 2023.

Abstract

Abstract A facile yet robust synthesis is reported herein to simultaneously incorporate atomically dispersed Co‐Nx sites with graphitic layer‐protected Co9S8 nanoparticles (denoted as Co SACs+Co9S8) as an efficient electrocatalyst for oxygen reduction in acidic solution. The Co SACs+Co9S8 catalyst shows low H2O2 selectivity (∼5 %) with high half‐wave potential (E1/2) of ∼0.78 VRHE in 0.5 M H2SO4. The atomic sites of the catalyst were quantified by a nitrite stripping method and the corresponding site density of the catalyst is calculated to be 3.2×1018 sites g−1. Besides, we also found the presence of a reasonable amount of Co9S8 nanoparticles is beneficial for the oxygen electrocatalysis. Finally, the catalyst was assembled into a membrane electrode assembly (MEA) for evaluating its performance under more practical conditions in proton exchange membrane fuel cell (PEMFC) system.

Details

Language :
English
ISSN :
21960216
Volume :
10
Issue :
12
Database :
Directory of Open Access Journals
Journal :
ChemElectroChem
Publication Type :
Academic Journal
Accession number :
edsdoj.6082ab47ad54fbe837cc49bf888cc60
Document Type :
article
Full Text :
https://doi.org/10.1002/celc.202300110