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Pàgina inicial > Articles > Articles publicats > Fe₃O₄@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte |
Data: | 2016 |
Resum: | The 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 Fe₃O₄@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 Fe₃O₄ nanocubes with a defective shell and the posterior diffusion of nickel cations within this defective shell. Fe₃O₄@NiFeO NPs were subsequently spin-coated over ITO-covered glass and their electrocatalytic activity toward water oxidation in carbonate electrolyte was characterized. Fe₃O₄@NiFeO catalysts reached current densities above 1 mA/cm² with a 410 mV overpotential and Tafel slopes of 48 mV/dec, which is among the best electrocatalytic performances reported in carbonate electrolyte. |
Ajuts: | European Commission 600388 Ministerio de Economía y Competitividad SEV-2013-0295 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR 1638 Agència de Gestió d'Ajuts Universitaris i de Recerca 2013/BP-A00344 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Core-shell nanostructure ; Electrocatalysts ; Iron oxide ; Magnetite ; Nanoparticle ; OER ; Oxygen evolution reaction |
Publicat a: | ACS applied materials & interfaces, Vol. 8, issue 43 (Feb. 2016) , p. 29461-29469, ISSN 1944-8252 |
Postprint 10 p, 3.4 MB |