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Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte

AuthorsLuo, ZhiShan; Martí-Sànchez, Sara ; Nafria, Raquel; Mata, Maria de la ; Morante, Joan Ramon; Arbiol, Jordi ; Ibáñez, Maria; Cabot, Andreu
Oxygen evolution reaction
Iron oxide
Core−shell nanostructure
Issue Date2016
PublisherAmerican Chemical Society
CitationACS Applied Materials and Interfaces 8(43): 29461-29469 (2016)
AbstractThe design and engineering of earth-abundant catalysts that are both cost-effective and highly active for water splitting are crucial challenges in a number of energy conversion and storage technologies. In this direction, herein we report the synthesis of FeO@NiFeO core-shell nanoheterostructures and the characterization of their electrocatalytic performance toward the oxygen evolution reaction (OER). Such nanoparticles (NPs) were produced by a two-step synthesis procedure involving the colloidal synthesis of FeO nanocubes with a defective shell and the posterior diffusion of nickel cations within this defective shell. FeO@NiFeO NPs were subsequently spin-coated over ITO-covered glass and their electrocatalytic activity toward water oxidation in carbonate electrolyte was characterized. FeO@NiFeO catalysts reached current densities above 1 mA/cm with a 410 mV overpotential and Tafel slopes of 48 mV/dec, which is among the best electrocatalytic performances reported in carbonate electrolyte.
Descriptionet al.
Identifiersdoi: 10.1021/acsami.6b09888
e-issn: 1944-8252
issn: 1944-8244
Appears in Collections:(CIN2) Artículos
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