article published yes Zhishan Luo author Sara Márti Sánchez author Raquel Nafria author Gihan Joshua author Maria De La Mata author Pablo Guardia author Christina Flox author Carlos Martínez Boubeta author Konstantinos Simeonidis author Jordi Llorca author Joan Morante author Jordi Arbiol author Maria Ibanez Sabate author 43C61214-F248-11E8-B48F-1D18A9856A870000-0001-5013-2843 Andreu Cabot author 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@NiFexOy 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@NiFexOy NPs were subsequently spin-coated over ITO-covered glass and their electrocatalytic activity toward water oxidation in carbonate electrolyte was characterized. Fe3O4@NiFexOy 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. American Chemical Society2016 eng nanoparticleiron oxidemagnetitecore−shell nanostructureelectrocatalystsoxygen evolution reactionOER 1944-8244 1944-8252 2773080810.1021/acsami.6b09888 84329461 - 29469 yes Luo Z, Márti Sánchez S, Nafria R, et al. Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte. <i>Applied Materials and Interfaces</i>. 2016;8(43):29461-29469. doi:<a href="https://doi.org/10.1021/acsami.6b09888">10.1021/acsami.6b09888</a> Z. Luo <i>et al.</i>, “Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte,” <i>Applied Materials and Interfaces</i>, vol. 8, no. 43. American Chemical Society, pp. 29461–29469, 2016. Z. Luo, S. Márti Sánchez, R. Nafria, G. Joshua, M. De La Mata, P. Guardia, C. Flox, C. Martínez Boubeta, K. Simeonidis, J. Llorca, J. Morante, J. Arbiol, M. Ibáñez, A. Cabot, Applied Materials and Interfaces 8 (2016) 29461–29469. Luo Z, Márti Sánchez S, Nafria R, Joshua G, De La Mata M, Guardia P, Flox C, Martínez Boubeta C, Simeonidis K, Llorca J, Morante J, Arbiol J, Ibáñez M, Cabot A. 2016. Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte. Applied Materials and Interfaces. 8(43), 29461–29469. Luo, Zhishan, et al. “Fe3O4@NiFexOy Nanoparticles with Enhanced Electrocatalytic Properties for Oxygen Evolution in Carbonate Electrolyte.” <i>Applied Materials and Interfaces</i>, vol. 8, no. 43, American Chemical Society, 2016, pp. 29461–69, doi:<a href="https://doi.org/10.1021/acsami.6b09888">10.1021/acsami.6b09888</a>. Luo, Z., Márti Sánchez, S., Nafria, R., Joshua, G., De La Mata, M., Guardia, P., … Cabot, A. (2016). Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen evolution in carbonate electrolyte. <i>Applied Materials and Interfaces</i>. American Chemical Society. <a href="https://doi.org/10.1021/acsami.6b09888">https://doi.org/10.1021/acsami.6b09888</a> Luo, Zhishan, Sara Márti Sánchez, Raquel Nafria, Gihan Joshua, Maria De La Mata, Pablo Guardia, Christina Flox, et al. “Fe3O4@NiFexOy Nanoparticles with Enhanced Electrocatalytic Properties for Oxygen Evolution in Carbonate Electrolyte.” <i>Applied Materials and Interfaces</i>. American Chemical Society, 2016. <a href="https://doi.org/10.1021/acsami.6b09888">https://doi.org/10.1021/acsami.6b09888</a>. 3712018-12-11T11:46:05Z2026-05-13T13:32:06Z