@article {4556,
	title = {Modification of Conductive Carbon with N-Coordinated Fe-Co Dual-Metal Sites for Oxygen Reduction Reaction},
	journal = {ChemElectroChem},
	volume = {n/a},
	year = {2023},
	note = {<p>n/a</p>
},
	month = {2023},
	pages = {e202300272},
	publisher = {John Wiley \& Sons, Ltd},
	abstract = {<p>Abstract Earth-abundant commercial conductive carbon materials are ideal electrocatalyst supports but cannot be directly utilized for single-atom catalysts owing to the lack of anchoring sites. Therefore, we employed crosslink polymerization to modify the conductive carbon surface with Fe?Co dual-site electrocatalysts for oxygen reduction reaction (ORR). First, metal-coordinated polyurea (PU) aerogels were prepared using via crosslinked polymerization at ambient temperature. Then, carbon-supported, atomically dispersed Fe?Co dual-atom sites (FeCoNC/BP) were formed by high-temperatures pyrolysis with a nitrogen source. FTIR and 13C NMR measurements showed PU linkages, while 15N NMR revealed metal?nitrogen coordination in the PU gels. Asymmetric, N-coordinated, and isolated Fe?Co active structures were found after pyrolysis using XAS and STEM. In alkaline media, FeCoNC/BP exhibited excellent ORR activity, with a E1/2 of 0.93?V vs. RHE, higher than that of Pt/C (20?\%) (0.90?V), FeNC/BP (0.88?V), and CoNC/BP (0.85?V). An accelerated durability test (ADT) on FeCoNC/BP indicated good durability over 35000 cycles. FeCoNC/BP also showed moderate ORR and ADT performance in acidic media. The macro/mesoporous N-doped carbon structures enhanced the mass transport properties of the dual Fe?Co active-sites. Therefore, modifying carbon supports with nonprecious metal catalysts may be a cost-effective-strategy for sustained electrochemical energy conversion.</p>
},
	keywords = {conductive carbon, dual metal-atom catalysts, Electrocatalysis, oxygen reduction, polyurea aerogels},
	isbn = {2196-0216},
	url = {https://doi.org/10.1002/celc.202300272},
	author = {Muthusamy, Saravanakumar and Sabbah, Amr and Sabhapathy, Palani and Chang, Yu-Chung and Tadesse Billo and Syum, Zeru and Li-Chyong Chen and Kuei-Hsien Chen}
}
